et graphic bug

i have installed ET on windows7 64bit and now i have graphics issue, can anyone help me?

This is screenshot link -> http://postimage.org/image/iabh4zx35/

My PC config:
Notebook Packardbell
Ati mobility radeon hd5470 with latest catalyst version installed.

Original Microsoft Windows 7 Ultimate
6.1.7601 Service Pack 1 build 7601

The problem exists also with the original ET config

Tnx in advance

Farad.