OMFG! Freaking disaster!!

Finally i bought those
RAM: DDR2 Patriot 4GB PC800 Dual 2x2GB CL4 EP. System starts up without any problems.
But wtf O.O My wireless card just stopped working under 4gb of
ram. I am trying to uninstall drivers, instal again but i cant, vista has some problems with installing them and it says that drivers were not succesfully installed. I tried to change slots of my wireless card and
ram few times but it didnt help.
The most stupid thing is that card works perfectly under 2gb of my old
RAM (2x1gb) and also under one stick 2gb of my new
ram. I found that i am not the only one with this problem but noone found solution for this crap >.<
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BTW i didnt change my system to 64bit yet, but card should with work with 4gb on 32bit also! My friend had no problems with his wireless card and 4gb
ram on 32bit vista. In 2 days i am gonna borrow his card so i can know if this is fault of my card.
Guys please help me, i spend a lot of money for this memory and now i am gonna cut myself in the bathtube