Crystal Report Error!!! [ Not Resolved]

Yes, I have a problem in the seagate crystal report 7.0.

Problem 1: When i open a new report and select the table(s) from the sql server 2000, few tables can be added to the list and others cannot. It gives the error: 'Incorrect table name'. 'Error detected by database dll'.

Problem 2: When i designed a report successfully and then try to preview, it shows the error message ,with blank white screen. 'General SQL Error: Check messages from the SQL Server'.

If anybody knows how to solve this, please reply to my query.

Thanks in advance.
:p