Game File corruption - closing game client

Hello Community,

I have a BIG Problem:

If i start CrossFire, Launcher is OK, HGW is OK, and then if goes to the Loginscreen says
"Game File corruption - closing game client".

What i Try to do:

Reinstall, Dont help
Redownload + reinstall, Dont help
today, i tryed to Redownload & Reinstall the game again, but the "crossfire_downloader.exe" cant download the File.

So my Problem is, if i start CrossFire and go to the Loginscreen, popup a Message with the Contain: "Game File corruption - closing game client".

Please help.

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Thanks!