Drill-through report passing credentials

Is it possible to drill through to a report that does not have embeded credentials? Every time I link from a report that requires a sql username and password to run to another report that requires the same permissions, I recieve an error message stating: "One or more data sources is missing credentials" Is there a way to make RS prompt the end user to re-enter credentials after drilling through to the next report, or to make the credentials entered to access the first report pass through to the second report? The drilling through works perfectally from within visual studio, but fails to work when the report is viewed in IE.
Did you ever fix this problem? I am having the same problem. It works fine when run in Visual Studio but then on the server it does not prompt again for the credentials when drilling through to the next report. My email is scriptjunk3@.hotmail.com. If you did fix this or get an answer, please let me know here or at my email. Thank you.