"Fail to load report" error

[gate7cy]

I have this selection formula to choose records from my database :

        CrystalReportViewer1.SelectionFormula = "{AllServices.Completed} = False"
        CrystalReportViewer1.RefreshReport()

Even though this works bringing the correct result I still get an error shown. The error is

Fail to load report

Also my crystal report is very slow. I am using VS 2008 with an access 07 database that lies on a local network server. Thanks for the replies. If any....