E-VGA GeForce 6200 LE non-compatible?

First of all, sorry for my english.

One month ago, i bought a E-VGA Geforce 6200 A-LE, and i installed the latest driver of nvidia's website.
This worked fine for me, but while i was using my Ubuntu, Beryl running, (more details down), my screen freezes, and when i restart my PC, my screen became unlegible, then my xorg crashes.

I tried with ALL of the official drivers from nvidia and all of them returned the same problem.

My Xorg log says that my video card chipset is not recognized, or something like that.

This is strange, cause i've installed many nvidia cards, and i cant install this one.

I post here my question, this is my last resource.

System Specs:
Motherboard asrock k8upgrade vm-800
system RAM: 2x512 dimm ddr400
processor: AMD Sempron 2600+.
video card: E-VGA GeForce 6200 LE

S.O: Ubuntu Feisty Fawn (i386)

i've tried with the Gusty Tribe 3 and i get the same error.

Thanks for all, nl2br.

//Edit: note that it is not the same chipset of the normal GEFORCE's, this is one made by E-VGA, and i think this card is a low-profile one.