Crystal Reports using ASP.Net

Question

I am new to the ASP.net and crystal reports.. I created a report using crystal reports and i used 3 parameters as Division,Month & Year. These parameters values will come from database using dropdown lists.. after selecting the parameters, report button clicked the report should come.. Report is coming but the values what ever I taken are not displaying in the report.

Please give me solution for this and if code also provided it will be appreciated.

Thanks in Advance.

Dattu