Crystal report binding with large size data set throwing error

This is the way i am populating the crystal report.

      From SP(SQL Server 2000)---> Data set ----> Crystal Report(9.2).

I am generating the report into PDF,EXCEL and Word formats .

When large data is populated for the first time(EX: More than 40000 records) it is executing but when i am doing it for more than one time i am getting error like

         "Unable to connect: incorrect log on parameters"

 Exception Details: CrystalDecisions.CrystalReports.Engine.LogOnExcept ion: Error in File c:\temp\temp_1f959ed6-3c56-4113-813b-52349d7d0677.rpt: Unable to connect: incorrect log on parameters.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:

[LogOnException: Error in File c:\temp\temp_1f959ed6-3c56-4113-813b-52349d7d0677.rpt:
Unable to connect: incorrect log on parameters.]
   .N(String %, EngineExceptionErrorID ')
   .I(Int16 , Int32 )
   .H(Int16 )
   CrystalDecisions.CrystalReports.Engine.FormatEngin e.ExportToStream(ExportRequestContext reqContext)
   CrystalDecisions.CrystalReports.Engine.ReportDocum ent.ExportToStream(ExportFormatType formatType)



Please help me out for the above issue.



Thanks,

RK