Counter Strike Global Offensive doesn't start.

[justsum1]

I installed steam via playonlinux, and it runs pretty smoothly throught Wine. My GPU is Ati Radeon hd 5770, and with windows it can run most games really smoothly.

I installed CS GO though steam and when i try to start the game, all i get is an error message like this:

"Your graphics hardware does not support all features (CSM) needed to run this game.

Device Info:
Marked unsupported: 0
Supports PCF sampling: 1
DriverName: "Ati Radeon HD 5770 Series"
VendorID: 0x1002, DeviceID: 0x68BE
DriverHigh: 0x0006000E, DriverLow: 0x000A21E9
DXLevel: 95, MiniDXSupportLevel: 90, MaxDXSupportLevel: 95"

I am no geek so any of this makes absolutely no sense, is my GPU not supported or should i go and play with the registries?

Some concretical advice would be MORE than welcome!

[vitamin]

Have you install ATI's drivers?