Find 10 Differences

I have had these graphic problems all the time I've been playing GuildWars.
My computer:
Chill Innovation 510W supply
ASUS P4P800-E DeLuxe
Pentium 4 3.0GHz HT (Prescott)
2x 512MB DDR Kingston
MSI GeForce FX 5900XT 128MB (AGP) then MSI NX 7600GS 512MB
tried about 6 versions of forceware, none was able to solve my problem (also used Driver celaner pro, to make 1only 1 driver active at a time)
I have read the official site FAQ (to switch to High quality mode) - no effect
I have no problem in any other game, but GW seems like impossible to me to fix it.
It is even more funny that today I have bought a new VGA card - NX6700GS 512MB(which is not mentioned in that FAQ to make any problem) - the game still looks the same, anyone can help me plz ?