Node debugger not working

I have a Node project in Express frame-work .I am using WebMatrix IDE. This is the details of WebMatrix IDE

Version 2.0
WebMatrix: 7.1.1683.0
IIS Express: 8.0.8418.0
.NET Framework: 4.0.30319.296 (RTMGDR.030319-2900)
Web Deploy: 7.1.1631.0
SQL Server Compact: 4.0.8854.1
Web Platform Installer: 7.1.1679.0
ASP.NET Web Pages: 2.0.20715.0
ASP.NET Web Pages: 1.0.20105.407

I have installed Node debugger through "galleries".But when click on debugger icon.I get this message Chrome is not installed! Node Inspector requires Chrome. But is already installed.(I uninstalled and re-installed chrome,still same error.) When I give this URL directly in chrome browser http://localhost:25718/server.js/debug/ this message is displayed

The iisnode module is unable to deploy supporting files necessary to initialize the debugger. Please check that the identity of the IIS application pool running the node.js application has read and write access permissions to the directory on the server where the node.js application is located.

I am not able to identify what the issue is.Please Help. Web.config file

    <!-- 
     This configuration file is required if iisnode is used to run node processes behind
     IIS or IIS Express.  For more information, visit:

     https://github.com/tjanczuk/iisnode/blob/master/src/samples/configuration/web.config
-->
<configuration>
<system.webServer>
    <security>
        <requestFiltering allowDoubleEscaping="true" />
    </security>
    <handlers>
        <!-- indicates that the app.js file is a node.js application to be handled by the iisnode  module -->
        <add name="iisnode"
             path="server.js"
             verb="*"
             modules="iisnode" />
    </handlers>
    <rewrite>
        <rules>

            <!-- Don't interfere with requests for logs -->
            <rule name="LogFile"
                  patternSyntax="ECMAScript"
                  stopProcessing="true">
                <match url="^[a-zA-Z0-9_\-]+\.js\.logs\/\d+\.txt$" />
            </rule>

            <!-- Don't interfere with requests for node-inspector debugging -->
            <rule name="NodeInspector"
                  patternSyntax="ECMAScript"
                  stopProcessing="true">
                <match url="^server.js\/debug[\/]?" />
            </rule>

            <!-- First we consider whether the incoming URL matches a physical file in the  /public folder -->
            <rule name="StaticContent">
                <action type="Rewrite"
                        url="public{REQUEST_URI}" />
            </rule>

            <!-- All other URLs are mapped to the Node.js application entry point -->
            <rule name="DynamicContent">
                <conditions>
                    <add input="{REQUEST_FILENAME}"
                         matchType="IsFile"
                         negate="True" />
                </conditions>
                <action type="Rewrite"
                        url="server.js" />
            </rule>

        </rules>
    </rewrite>
    <!-- You can control how Node is hosted within IIS using the following options -->
                <!--<iisnode      
                  node_env="%node_env%"
                  nodeProcessCommandLine="&quot;%programfiles%\nodejs\node.exe&quot;"
                  nodeProcessCountPerApplication="1"
                  maxConcurrentRequestsPerProcess="1024"
                  maxNamedPipeConnectionRetry="3"
                  namedPipeConnectionRetryDelay="2000"      
                  maxNamedPipeConnectionPoolSize="512"
                  maxNamedPipePooledConnectionAge="30000"
                  asyncCompletionThreadCount="0"
                  initialRequestBufferSize="4096"
                  maxRequestBufferSize="65536"
                  watchedFiles="*.js"
                  uncFileChangesPollingInterval="5000"      
                  gracefulShutdownTimeout="60000"
                  loggingEnabled="true"
                  logDirectoryNameSuffix="logs"
                  debuggingEnabled="true"
                  debuggerPortRange="5058-6058"
                  debuggerPathSegment="debug"
                  maxLogFileSizeInKB="128"
                  appendToExistingLog="false"
                  logFileFlushInterval="5000"
                  devErrorsEnabled="true"
                  flushResponse="false"      
                  enableXFF="false"
                  promoteServerVars=""
                 />-->
    <iisnode watchedFiles="*.js;node_modules\*;routes\*.js;views\*.jade" />
</system.webServer>
</configuration>