Report Manager Error: The underlying connection was closed: The connection was closed unexpectedly.

Hi, I know there is many topics with this subject, but I already did my search (I went to the fifth page of my google search) and I still don't got the solution.

Problem:

I recently installed de Report Services 2008 in my computer and I configured with the default settings. When I try to acess the Report Manager(http://localhost/Reports) I get this error:

The underlying connection was closed: The connection was closed unexpectedly.

The content of the log file:

ui!ReportManager_0-7!450!06/14/2014-18:58:36:: e ERROR: The underlying connection was closed: The connection was closed unexpectedly.
ui!ReportManager_0-7!450!06/14/2014-18:58:36:: e ERROR: HTTP status code --> 500
-------Details--------
System.Net.WebException: The underlying connection was closed: The connection was closed unexpectedly.

   at Microsoft.SqlServer.ReportingServices2005.RSConnection.GetSecureMethods()

   at Microsoft.ReportingServices.UI.Global.RSWebServiceWrapper.GetSecureMethods()

   at Microsoft.SqlServer.ReportingServices2005.RSConnection.IsSecureMethod(String methodname)

   at Microsoft.SqlServer.ReportingServices2005.RSConnection.ValidateConnection()

   at Microsoft.ReportingServices.UI.Global.SecureAllAPI()

   at Microsoft.ReportingServices.UI.ReportingPage.EnsureHttpsLevel(HttpsLevel level)

   at Microsoft.ReportingServices.UI.ReportingPage.ReportingPage_Init(Object sender, EventArgs args)

   at System.EventHandler.Invoke(Object sender, EventArgs e)

   at System.Web.UI.Control.OnInit(EventArgs e)

   at System.Web.UI.Page.OnInit(EventArgs e)

   at System.Web.UI.Control.InitRecursive(Control namingContainer)

   at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
ui!ReportManager_0-7!450!06/14/2014-18:58:38:: e ERROR: Exception in ShowErrorPage: System.Threading.ThreadAbortException: Thread was being aborted.
   at System.Threading.Thread.AbortInternal()
   at System.Threading.Thread.Abort(Object stateInfo)
   at System.Web.HttpResponse.End()
   at Microsoft.ReportingServices.UI.ReportingPage.ShowErrorPage(String errMsg) at    at System.Threading.Thread.AbortInternal()
   at System.Threading.Thread.Abort(Object stateInfo)
   at System.Web.HttpResponse.End()
   at Microsoft.ReportingServices.UI.ReportingPage.ShowErrorPage(String errMsg)
library!WindowsService_3!14ac!06/14/2014-19:02:18:: i INFO: Call to CleanBatch()
library!WindowsService_3!14ac!06/14/2014-19:02:19:: i INFO: Cleaned 0 batch records, 0 policies, 0 sessions, 0 cache entries, 0 snapshots, 0 chunks, 0 running jobs, 0 persisted streams, 0 segments, 0 segment mappings.
library!WindowsService_3!14ac!06/14/2014-19:02:19:: i INFO: Call to CleanBatch() ends

I already try:

• Modify in the file "rsreportserver.config": <Add Key="SecureConnectionLevel" Value="0"/>
• Turn Off the Windows Firewall
• Turn Off the Antivirus
• Install and review IIS configuration
• Reboot computer

I realy dont know what is missing.

Note: The Report Service Web Service is working.

Many thanks.