Crystal Reports and Data Environment

Hi,
I need some help on using DataEnvironment with the crystal reports. I created DataEnvironment and underneath, I created a connection and then a command. When I pass connection and command to Report.Database.AddAdoCommand, I am getting that the command I passed in not valid. If i create another ADOCommand and passed then I get the message, Server not yet opened. Please throw some light on it.

Thanks

Post some code, and are you using the report designer addin for vb or creating the reports in crystal and then calling them from vb?