sub report data source at run time

I have a sub report and on the main report and I want to set up sub report and main report data soruce using stored procedures.

I have following code, it only runs sub report, but not main report has sub report on it.

I would like to know any way to set sub report and main report to run a report which has sub report on it,

Your help and information is great appreciated,

Regards,

Iccsi, 

<cfreport format = "PDF" template= "subReport.cfr"

      query = "#mysubStored#">

  </cfreport>

   <cfreport format = "PDF" template= "MainReport.cfr"

      query = "#mydata#">

  </cfreport>

  </CFIF>