details section in crystal reports printing twice vb 2010.please help me

i am printing a crystal report but the detail section printing twice this is my problem how to solve this problem please help. i am using vs 2010 and crystal reports for vs 2010

What is the code you're using to invoke the printing ?

Assuming more than one table and there really should only be one record, not two, my experience has lead me to look first at table linking as the culprit.