missing drum notes?

hey!

I have this problem, that i cant seem to find an answer for. When I go to my palette, and hit drums, the window is just empty. I dont know if there's something more i should install, or what it is. But help is appreciated!

I'm danish, so my musescore is in danish and my english is not the prettiest.

thanks in advance!

ps. "trommer" means drums!