Help: how to input drum notes?

Hi,

I am new to musescore and new to this forum - let alone new to drum notes. Detecting musescore on my Linux-Uubuntu 10.04.1 repositories, I thought I might give it a try. This version is 'Musescore Unstable Prerelease for Version 0.9.6, Revision: 2613'

Why do I ask for help?

I find it impossible to add drum notes, using the online Handbook, under "Drum notation". Is there something like a "Musescore: How to input drum notes For Dummies" ;-) for the absolute-drum-notes-beginner?

Here are some details:

I have created 3 combined staves, 2 piano, 1 military drum. It is very easy for me to add notes to the piano staves, but i cannot add drum notes to the military drum stave. This has only a single line with whole-note-rests per measure. These rests won't be changed into drum notes, whatever I try from the Handbook.

Can anybody help me?

Thank you,

musecub