Marvell Libertas 8335/Sweex LW057 issues

computer specs this applies to:

ASUS A8V-MX
AMD Athlon 64 3200+
1GB DDR400 RAM
80GB Maxtor IDE
HD3650 512mb graphics card

SWEEX LW057/ MARVELL LIBERTAS 8335

I used to run XP on this computer, but Im used to Windows 7 since thats my main computer's OS. So I thought, what the hell. I checked compatibility and it said my wifi card shouldnt have an issue with Windows 7. I installed the OS, booted, and my wifi card was gone from the device manager. So I cant install the driver, since Sweex nor Marvell supplies an installation program. just the inf and sys files, which isnt enough.

I also tried show hidden devices, nothing popped up. legacy driver didnt work either.

the card is indeed working, as I tried in another pc. the pci slots are fine too. its a software related problem.

does anyone have an idea?

there is no IRQ conflict either, and the BIOS is set correctly.

the device simply wont turn on, thats the problem. in XP it turns on no problem, and Vista is supposed to have built-in drivers. this doesnt make sense