Problem with OpenID publishing

[fladei]

Hello DaniWeb community!
I have the following problem:
I developed and OpenID authentication system on C#, it worked perfectly on my LocalHost, but when I published it, I keep getting this error messages about No OpenID endpoint found. I'm using Google, Yahoo, Chi.mp and myOpenID, and with none of them works on IIS, but on LocalHost it works perfectly.
The error log is the following:

Error:System.Web.HttpUnhandledException: Exception of type 'System.Web.HttpUnhandledException' was thrown. ---> DotNetOpenAuth.Messaging.ProtocolException: No OpenID endpoint found.
   at DotNetOpenAuth.Messaging.ErrorUtilities.VerifyProtocol(Boolean condition, String message, Object[] args)
   at DotNetOpenAuth.OpenId.RelyingParty.OpenIdRelyingPartyControlBase.LogOn()
   at WikiLoader.Login.OpenId_Click(Object sender, CommandEventArgs e) 
   at System.Web.UI.WebControls.ImageButton.OnCommand(CommandEventArgs e)
   at System.Web.UI.WebControls.ImageButton.RaisePostBackEvent(String eventArgument)
   at System.Web.UI.WebControls.ImageButton.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument)
   at System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument)
   at System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData)
   at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
   --- End of inner exception stack trace ---
   at System.Web.UI.Page.HandleError(Exception e)
   at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
   at System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
   at System.Web.UI.Page.ProcessRequest()
   at System.Web.UI.Page.ProcessRequestWithNoAssert(HttpContext context)
   at System.Web.UI.Page.ProcessRequest(HttpContext context)
   at ASP.login_aspx.ProcessRequest(HttpContext context) 
   at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

Source: System.Web

Message: Exception of type 'System.Web.HttpUnhandledException' was thrown.

Stack trace:    at System.Web.UI.Page.HandleError(Exception e)
   at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
   at System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
   at System.Web.UI.Page.ProcessRequest()
   at System.Web.UI.Page.ProcessRequestWithNoAssert(HttpContext context)
   at System.Web.UI.Page.ProcessRequest(HttpContext context)
   at ASP.login_aspx.ProcessRequest(HttpContext context) System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

[Momerath]

You might be having a proxy problem on IIS, try adding this:

<defaultProxy useDefaultCredentials="true">  
    <proxy autoDetect="True" usesystemdefault="True"/>  
</defaultProxy>