server cleanup wizard problem - unable to connect to the WSUS Server Database.

I'm trying to run server cleanup wizard.. it starts to run and then after a while it gives me this error:

The WSUS administration console was unable to connect to the WSUS Server Database.
   
Verify that SQL server is running on the WSUS Server. If the problem persists, try restarting SQL.
   

System.Data.SqlClient.SqlException -- Timeout expired.  The timeout period elapsed prior to completion of the operation or the server is not responding.
The statement has been terminated.

Source
.Net SqlClient Data Provider

Stack Trace:
   at Microsoft.UpdateServices.Internal.BaseApi.SoapExceptionProcessor.DeserializeAndThrow(SoapException soapException)
   at Microsoft.UpdateServices.Internal.DatabaseAccess.AdminDataAccessProxy.ExecuteSPSearchUpdates(String updateScopeXml, String preferredCulture, ExtendedPublicationState publicationState)
   at Microsoft.UpdateServices.Internal.BaseApi.Update.SearchUpdates(UpdateScope searchScope, ExtendedPublicationState publicationState, UpdateServer updateServer)
   at Microsoft.UpdateServices.Internal.BaseApi.UpdateServer.GetUpdates(UpdateScope searchScope)
   at Microsoft.UpdateServices.UI.AdminApiAccess.UpdateManager.GetUpdates(ExtendedUpdateScope filter)
   at Microsoft.UpdateServices.UI.AdminApiAccess.WsusSynchronizationInfo.InitializeDerivedProperties()
   at Microsoft.UpdateServices.UI.AdminApiAccess.WsusSynchronizationInfo.get_NewUpdatesCount()
   at Microsoft.UpdateServices.UI.SnapIn.Pages.SyncResultsListPage.GetSyncInfoRow(WsusSynchronizationInfo syncInfo)
   at Microsoft.UpdateServices.UI.SnapIn.Pages.SyncResultsListPage.GetListRows()



Thanks