I made the change suggested with guess rows and that works on a 32 bit machine, but my Sql Server 2005 is on a 64 bit machine and there is no excel installed on that.  When I run a job containing an excel datasource I specify the DTExec32.exe to run the job.  In that scenario where does the guessrows parameter be set in the registry please let me know.  Any inputs will be much appreciated.

Thanks,

Manisha