Ah, you're right, We've got differend versions of RTRPE1.9, I've got my version from: http://www.filefactory.com/file/1ec976/ an it's only 123MB large. I didn't know that there are two existing versions of the same mod, an hadn't got any problems until now. Okay, thanks for the link, i will try it again with this version.
/Edit: Okay, with this new version it works fine.