print/export data from crystal report

Question

hi,
  I am my data in crystal report.i am using Report Document class and stored procedure(with two input parameters) to bind data in crystal report viewer.
  Parameters of stored procedure can be null.When i display data in report viewer it works but now i want to export/Print data through report viewer print or export button.
and when i click on button it ask for parameters and login information of server.how i solve this problem.

if any one have idea,Please share.......


Thanks in advance.