Drag-n-drop plugins problem

[nooooord]

Hi all. Please help me with drag-n-drop plugin. No one of found is not working:

http://www.schwarz.de/remository/func-startdown/130/
https://github.com/thomasysliu/Roundcube-Plugin-Drag-and-Upload

What I doing wrong? I using FF 12.0 release and Roundcube 0.8b (same problem was actual for RC v0.5 too)

Thanks. Sorry 4 my bad english