Sharepoint Crystal Report Webpart

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SharePoint

Hi,

I have deployed a crystal report web part in live server sharepoint site.using .rpt file method.
When I select the rpt file the system does not show the data and graph anything

Actually in my test server this webpart is working fine. What I did is I have taken this dll file in to live server. Live server only has the problem, so kindly advise me anything I want to include in live server?

Test server sharepoint and Db are on the same machine but in Live server Sharepoint and Db are not on the same machine. Sharepoint in one server and Database is in another server and ldap is in one server.
Also, I am using rpt file which was created in test server using live database server database,tables.