If the drums are Realdrums then you are hearing an audio track and no midi tracks.

Check your midi setup. If you click on the Drum Icon (you didn't say which version you are using), you should be able to disable RealDrums). Now hit play and if you hear nothing your midi is not setup as required.

In order to get started try the Cheesy Microsoft midi in Opts Midi..if you can hear instruments then it's time to troubleshoot the next level.

John Conley
Musica est vita