Outlook CRM 2011 - not return any Service Endpoints

Hi, I've installed CRM 2011 - on W2K8; the web site is working fine; I can connect from LAN.

Now on a W7 client I try to install the Outlook connector.

As the server url I entered: http://myserver:5555 and I click on "Test Connection" button; the form is populated with the correct user, organization and display name but when I click on "Ok" button I receive the following error:

There is a problem communicating with the Microsoft Dynamics CRM server. The server might be unavailable. Try again later. If the problem persists, contact your system administrator.

The IIS CRM site has the anonymous authentication enabled and I can access from the client the following url without problems:http://crmserver:5555/XRMServices/2011/Discovery.svc

Below is the log file:

20:18:18|  20:18:19|Verbose| Method exit: Microsoft.Crm.Application.Outlook.Config.ConfigInfo.RemoveOrphanDatastoreIfNeeded
20:18:19|Verbose| Method exit: Microsoft.Crm.Application.Outlook.Config.ConfigInfo.ConfigInfo
20:18:19|Verbose| Method exit: Microsoft.Crm.Application.Outlook.Config.MainForm.MainForm
20:18:19|Verbose| Method entry: Microsoft.Crm.Application.Outlook.Config.MainForm.MainForm_Shown
20:18:19|Verbose| Method entry: Microsoft.Crm.Application.Outlook.Config.MainForm.AddServer
20:18:19|Verbose| Method entry: Microsoft.Crm.Application.Outlook.Config.ServerForm.ServerForm
20:18:19|Verbose| Method exit: Microsoft.Crm.Application.Outlook.Config.ServerForm.ServerForm
20:18:19|Verbose| Method entry: Microsoft.Crm.Application.Outlook.Config.ServerForm.SetUIData
20:18:19|Verbose| Method exit: Microsoft.Crm.Application.Outlook.Config.ServerForm.LoadAvailableUrls
20:18:19|Verbose| Method exit: Microsoft.Crm.Application.Outlook.Config.ServerForm.LoadAvailableUrls
20:18:19|Verbose| Method exit: Microsoft.Crm.Application.Outlook.Config.ServerForm.SetUIData
20:18:25|Verbose| Method entry: Microsoft.Crm.Application.Outlook.Config.ServerForm._testConnectionButton_Click
20:18:25|Verbose| Method entry: Microsoft.Crm.Application.Outlook.Config.ServerForm.TestConnection
20:18:25|Verbose| Method exit: Microsoft.Crm.Application.Outlook.Config.ServerForm.TestConnection
20:18:25|Verbose| Method exit: Microsoft.Crm.Application.Outlook.Config.ServerForm._testConnectionButton_Click
20:18:26|  Info| Fill organization comboBox with server information.
20:18:27|Verbose| Method entry: Microsoft.Crm.Application.Outlook.Config.ServerForm._okButton_Click
20:18:27|Verbose| Method exit: Microsoft.Crm.Application.Outlook.Config.ServerForm._okButton_Click
20:18:27| Error| Exception : The provided uri did not return any Service Endpoints!  at Microsoft.Xrm.Sdk.ClientExceptionHelper.Assert(Boolean condition, String message)
  at Microsoft.Xrm.Sdk.Client.ServiceConfiguration`1..ctor(Uri serviceUri)
  at Microsoft.Xrm.Sdk.Client.OrganizationServiceConfiguration..ctor(Uri serviceUri)
  at Microsoft.Xrm.Sdk.Client.ServiceConfigurationFactory.CreateConfiguration[TService](Uri serviceUri)
  at Microsoft.Crm.Outlook.ClientAuth.ClientAuthProvidersFactory`1.GetAuthProvider(Uri endPoint, Credential credentials, AuthUIMode uiMode, Uri webEndPoint, IClientOrganizationContext context, Form parentWindow)
  at Microsoft.Crm.Application.Outlook.Config.ServerInfo.LoadUserId()
  at Microsoft.Crm.Application.Outlook.Config.ServerInfo.Initialize(Uri discoveryUri, OrganizationDetail selectedOrg, String displayName, Boolean isPrimary)
  at Microsoft.Crm.Application.Outlook.Config.ServerForm.LoadDataToServerInfo()
  at Microsoft.Crm.Application.Outlook.Config.ServerForm.<InitializeBackgroundWorkers>b__2(Object sender, DoWorkEventArgs e)
  at System.ComponentModel.BackgroundWorker.OnDoWork(DoWorkEventArgs e)
  at System.ComponentModel.BackgroundWorker.WorkerThreadStart(Object argument)
20:18:30|Verbose| Method exit: Microsoft.Crm.Application.Outlook.Config.MainForm.AddServer
20:18:30|Verbose| Method exit: Microsoft.Crm.Application.Outlook.Config.MainForm.MainForm_Shown
20:18:31|Verbose| Method entry: Microsoft.Crm.Application.Outlook.Config.ClientConfig.Terminate
20:18:31|  Info| Exit code: Default
20:18:31|Verbose| Method exit: Microsoft.Crm.Application.Outlook.Config.ClientConfig.Terminate
20:18:31|  Info| === Microsoft Dynamics CRM for Outlook Configuration Wizard logging stopped: 4/6/2011 8:18:31 PM ===

Any ideas ?

Thank you,

Daniel