I have a report that will generate a list of patient invoices. The main report has patient demographic data and the subreport has billing data. I need the subreport to be "linked" to the main report based on an MRN, unique identifier. The MRN is in the stored procedure for the main report and I have it set up as a parameter in the stored procedure for the subreport but, the report times out. Any thoughts? How should I set the report and subreport up?