ERROR: Unsupported video card

[xKalex]

Hello.

Recently, I installed 32-bit Ubuntu 10.04(lucid), Kernel 2.6.32-24-generic on my PC. Then I installed Regnum Online and tried to run it. When I clicked on "Log In" an error message appeared saying that I have an unsupported video card.(take a look on screenshot below)

My video card: Intel Mobile 4 Series Chipset Integrated Graphics Controller (rev 07).

The game worked fine when I had Windows 7(64bit).

I was wondering if there is any way of fixing that. I am quite new to Linux.
If anybody can help me, I'll be really glad.

Thank you!