Hello,

Download the latest patch for 2007 if you don't have it already.
http://www.pgmusic.com/support_windowsupdates.htm#242

Then, download and install the RealDrums 1-3 update patch and this should fix the problem.
http://www.pgmusic.com/support_windows_realdrums.htm#RealDrums1-3


Andrew
PG Music Inc.