Connection problem in SQL Server 2008

Question

I could connect the database to different server thro' network, but last few days it fails to connect. It populates the Error message Failed to retrieve data for this request (Microsoft.SqlServer.Management.Sdk.Sfc.EnumeratorCore)

To my suprises I could connect the SQL Profiler. If there is network problem it wouldn't connect profiler. I think there is no problem in Network. Could anyone help me out.