Problem with Crystal Reports

How do I connect in crystal reports. I'm using stored procedure in crystal reports. When I try to call my report in vb.net 2005 it was sucessfully loaded in crystal report viewer. However if I change the database name of my report connection (In case I change my database name) I was encounter error, the parameters of my stored procedure in crystal report is invalid...Can you give me some example...

Thanks in advance....

[437 byte] By [Mr.007] at [2007-12-23]