System.Web.HttpException: Failed to Execute URL when running web service, MVC3 - web-services

I have converted ASP.NET application to run ASP.NET and MVC 3 together. And there is some web service (/WS/Inventory.asmx/getInventory) that shows the following exception now:
System.Web.HttpException: Failed to Execute URL.
[HttpException (0x80004005): Failed to Execute URL.]
System.Web.Hosting.ISAPIWorkerRequestInProcForIIS6.BeginExecuteUrl(String url, String method, String childHeaders, Boolean sendHeaders, Boolean addUserIndo, IntPtr token, String name, String authType, Byte[] entity, AsyncCallback cb, Object state) +2428801
System.Web.HttpResponse.BeginExecuteUrlForEntireResponse(String pathOverride, NameValueCollection requestHeaders, AsyncCallback cb, Object state) +417
System.Web.DefaultHttpHandler.BeginProcessRequest(HttpContext context, AsyncCallback callback, Object state) +192
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +8862676
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +184
I running it on Windows 7 with IIS 7 though there is the same exception on Windows 2003.
Here is web config section:
<system.webServer>
<defaultDocument>
<files>
<add value="index.aspx" />
</files>
</defaultDocument>
<httpErrors errorMode="Detailed" />
<modules runAllManagedModulesForAllRequests="true">
<add name="OverloadProtection" type="Winncom.Classes.HttpModules.OverloadProtection,Winncom" preCondition="managedHandler" />
<add name="Rewrite" type="Winncom.Classes.HttpModules.Rewrite,Winncom" preCondition="managedHandler" />
<add name="HttpCompression" type="Winncom.Classes.HttpModules.HttpCompression,Winncom" preCondition="managedHandler" />
</modules>
<handlers>
<remove name="UrlRoutingHandler" />
<add name="PageHandlerFactory-ISAPI-2.0-html" path="*.html" verb="*" modules="IsapiModule" scriptProcessor="C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_isapi.dll" resourceType="Unspecified" requireAccess="None" preCondition="classicMode,runtimeVersionv4.0,bitness32" />
<add name="*.aspx_*" path="*.aspx" verb="*" type="Winncom.Classes.Service.HandlerDispatcher" resourceType="Unspecified" requireAccess="Script" preCondition="integratedMode,runtimeVersionv4.0" />
<add name="*/cjpegimage.aspx_*" path="*/cjpegimage.aspx" verb="*" type="System.Web.UI.PageHandlerFactory" preCondition="integratedMode,runtimeVersionv2.0" />
<add name="*/webpages/*.html_*" path="*/webpages/*.html" verb="*" type="System.Web.UI.PageHandlerFactory" preCondition="integratedMode,runtimeVersionv2.0" />
</handlers>
<validation validateIntegratedModeConfiguration="false" />
</system.webServer>
<runtime>
<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
<dependentAssembly>
<assemblyIdentity name="System.Web.Mvc" publicKeyToken="31bf3856ad364e35" />
<bindingRedirect oldVersion="1.0.0.0-2.0.0.0" newVersion="3.0.0.0" />
</dependentAssembly>
</assemblyBinding>
</runtime>
Any ideas would be nice. Thanks!

Try adding this to your handlers section in the web.config
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To create a new site click on the server name and add a new website.
enter your site folder path and binding detail.
and copy your old web.config file to the new create site folder and make changes that you want.
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<system.webServer>
<staticContent>
<mimeMap fileExtension=".apk" mimeType="application/vnd.android.package-archive" />
<mimeMap fileExtension=".config" mimeType="application/xml" />
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<Ciudad>
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