diff --git a/src/server/server.ts b/src/server/server.ts
index 020b2d3a34..fa26de2e07 100644
--- a/src/server/server.ts
+++ b/src/server/server.ts
@@ -77,7 +77,7 @@ namespace ts.server {
     });
 
     function compress(s: string): CompressedData {
-        const data = zlib.gzipSync(new Buffer(s,  "utf8"));
+        const data = zlib.gzipSync(new Buffer(s, "utf8"));
         return { data, length: data.length, compressionKind: "gzip" };
     }
 
@@ -167,7 +167,7 @@ namespace ts.server {
         constructor(private readonly logger: server.Logger) {
             switch (process.platform) {
                 case "win32":
-                    this.cachePath =  normalizeSlashes(combinePaths(process.env.LOCALAPPDATA || process.env.APPDATA, "Microsoft/TypeScript"));
+                    this.cachePath = normalizeSlashes(combinePaths(process.env.LOCALAPPDATA || process.env.APPDATA, "Microsoft/TypeScript"));
                     break;
                 case "darwin":
                 case "linux":
@@ -177,6 +177,7 @@ namespace ts.server {
         }
 
         bind(session: Session) {
+            this.session = session;
             if (this.logger.hasLevel(LogLevel.requestTime)) {
                 this.logger.info("Binding...")
             }
@@ -202,15 +203,11 @@ namespace ts.server {
             this.installer.send(request);
         }
 
-        C = 1;
         private handleMessage(response: InstallTypingsResponse) {
             if (this.logger.hasLevel(LogLevel.verbose)) {
                 this.logger.info(`Received response: ${JSON.stringify(response)}`)
             }
-            require("fs").appendFileSync("E:\\sources\\git\\tss.txt", this.C + " !!!::" + JSON.stringify(response) + "\r\n");
-            this.C++;
             this.session.onTypingsInstalled(response);
-            require("fs").appendFileSync("E:\\sources\\git\\tss.txt", this.C + " !!!::" + "done" + "\r\n");
         }
     }
 
@@ -293,7 +290,7 @@ namespace ts.server {
             }
             traceToConsole = logEnv.traceToConsole;
         }
-        return new Logger(fileName, traceToConsole,  detailLevel);
+        return new Logger(fileName, traceToConsole, detailLevel);
     }
     // This places log file in the directory containing editorServices.js
     // TODO: check that this location is writable
@@ -448,7 +445,7 @@ namespace ts.server {
 
     const useSingleInferredProject = sys.args.some(arg => arg === "--useSingleInferredProject");
     const ioSession = new IOSession(sys, cancellationToken, useSingleInferredProject, logger);
-    process.on("uncaughtException", function(err: Error) {
+    process.on("uncaughtException", function (err: Error) {
         ioSession.logError(err, "unknown");
     });
     // Start listening
diff --git a/src/server/session.ts b/src/server/session.ts
index 4319f5031c..6c4deef2e7 100644
--- a/src/server/session.ts
+++ b/src/server/session.ts
@@ -1459,6 +1459,7 @@ namespace ts.server {
             }
             this.projectService.typingsCache.updateTypingsForProject(response.projectName, response.compilerOptions, response.typingOptions, response.typings);
             project.updateGraph();
+            
         }
 
         public onMessage(message: string) {
diff --git a/src/server/types.d.ts b/src/server/types.d.ts
index 252b52bbcf..503bba1f9d 100644
--- a/src/server/types.d.ts
+++ b/src/server/types.d.ts
@@ -33,5 +33,6 @@ declare namespace ts.server {
 
     export interface InstallTypingHost extends JsTyping.TypingResolutionHost {
         writeFile(path: string, content: string): void;
+        createDirectory(path: string): void;
     }
 }
\ No newline at end of file
diff --git a/src/server/typingsInstaller/nodeTypingsInstaller.ts b/src/server/typingsInstaller/nodeTypingsInstaller.ts
index 32a7cfd680..fe1f372fa7 100644
--- a/src/server/typingsInstaller/nodeTypingsInstaller.ts
+++ b/src/server/typingsInstaller/nodeTypingsInstaller.ts
@@ -42,12 +42,7 @@ namespace ts.server.typingsInstaller {
             return sys;
         }
 
-        C = 1;
-
         protected sendResponse(response: InstallTypingsResponse) {
-            (<any>response).___id = [this.C];
-            this.C++;
-            log("sendResponse::" + JSON.stringify(response));
             process.send(response);
         }
 
diff --git a/src/server/typingsInstaller/typingsInstaller.ts b/src/server/typingsInstaller/typingsInstaller.ts
index 012053544e..cb9c5e0b23 100644
--- a/src/server/typingsInstaller/typingsInstaller.ts
+++ b/src/server/typingsInstaller/typingsInstaller.ts
@@ -2,9 +2,6 @@
 /// <reference path="../types.d.ts"/>
 
 namespace ts.server.typingsInstaller {
-    export function log(s: string) {
-        require("fs").appendFileSync("E:\\sources\\git\\installer.txt", s + "\r\n");
-    }
     const DefaultTsdSettings = JSON.stringify({
         version: "v4",
         repo: "DefinitelyTyped/DefinitelyTyped",
@@ -22,7 +19,6 @@ namespace ts.server.typingsInstaller {
             if (!this.isTsdInstalled) {
                 this.isTsdInstalled = this.installPackage("tsd");
             }
-            log(`start ${this.isTsdInstalled}`);
         }
 
         install(req: InstallTypingsRequest) {
@@ -30,7 +26,6 @@ namespace ts.server.typingsInstaller {
                 return;
             }
 
-            log(`install ${JSON.stringify(req)}`);
             const discoverTypingsResult = JsTyping.discoverTypings(
                 this.getInstallTypingHost(),
                 req.fileNames,
@@ -40,7 +35,6 @@ namespace ts.server.typingsInstaller {
                 req.typingOptions,
                 req.compilerOptions);
 
-            log(`install ${JSON.stringify(discoverTypingsResult)}`);
             // respond with whatever cached typings we have now
             this.sendResponse(this.createResponse(req, discoverTypingsResult.cachedTypingPaths));
             // start watching files
@@ -51,7 +45,6 @@ namespace ts.server.typingsInstaller {
 
         private installTypings(req: InstallTypingsRequest, currentlyCachedTypings: string[], typingsToInstall: string[]) {
             typingsToInstall = filter(typingsToInstall, x => !hasProperty(this.missingTypings, x));
-            log(`install ${JSON.stringify(typingsToInstall)}`);
             if (typingsToInstall.length === 0) {
                 return;
             }
@@ -60,6 +53,7 @@ namespace ts.server.typingsInstaller {
             const host = this.getInstallTypingHost();
             const tsdPath = combinePaths(req.cachePath, "tsd.json");
             if (!host.fileExists(tsdPath)) {
+                this.ensureDirectoryExists(req.cachePath, host);
                 host.writeFile(tsdPath, DefaultTsdSettings);
             }
 
@@ -67,11 +61,20 @@ namespace ts.server.typingsInstaller {
                 // TODO: record new missing package names
                 // TODO: watch project directory
                 installedTypings = installedTypings.map(x => getNormalizedAbsolutePath(x, req.cachePath));
-                log(`include ${JSON.stringify(installedTypings)}`);
                 this.sendResponse(this.createResponse(req, currentlyCachedTypings.concat(installedTypings)));
             });
         }
 
+        private ensureDirectoryExists(directory: string, host: InstallTypingHost): void {
+            const directoryName = getDirectoryPath(directory);
+            if (!host.directoryExists(directoryName)) {
+                this.ensureDirectoryExists(directoryName, host);
+            }
+            if (!host.directoryExists(directory)) {
+                host.createDirectory(directory);
+            }
+        }
+
         private watchFiles(files: string[]) {
             // TODO: start watching files
         }