A error has occurred trying to process your URL

Hello:

In GP 2010 SP3 (11.00.2044), I published an Excel spreadsheet through Excel Report Builder containing sales data with a drill-down on customer number.  When I try to drill down in the spreadsheet on customer number, an error appears saying:  "A error has occurred trying to process your URL".

The grammar on the error is incorrect, by the way.

Regardless, how can I fix this to allow drilling down?  I'm using Office Professional 2010 64-bit, by the way.  I have the necessary permissions, also.  And, I have GP 2010 open in the background.

Thanks!

John