CrystalReportViewer Does not show reports

Question

I had made a CrystalReport using a stored procedure, when I click on a button to show it in a crystal report viewer, I don't see anything but see message :

Wait while the document is being processing

Sometimes I don't even see this message. I tried the same code with the same CrystalReport in another Form, it works pretty good, but not in the other( Huge Project ).

CrystalReport1 cr = new CrystalReport1();

DataTable dt = new DataTable();

dt = GetCmd.GetOrderDetails(123);

cr.SetDataSource(dt);


crystalReportViewer1.ReportSource = cr;
crystalReportViewer1.Refresh();