Mw2 Server

Hi

I like to start a private MW2 server on my windows 2008 r2 dedicatedserver. I downloaded liberation (Im donor there so i can use the console only thingy) but i cant start the game over liberation. When i press "load game" the start image loads and ends up with an error like "couldn´t load image ‘gamesfont_pc’" ore something. (i had some other direct x erros at the beginning but i think i fixed them) The wierd thing is that i can start the game without liberation and i can see the menu for some seconds before it ends up with cheat dedected because im using a banned account.

What i did allready is:

Disabled UAC
Installed all that Framework stuff wich is named in liberation read-me
Started Liberation as admin
Set graphics to minimum (mw2 config tool)

nothing helped..

Somebody got an idea what i can do to get it work?

thx in advance