AMD X2 Dual Core and Vista Ultimate Problems

hi all,i have just updated my processor in vista ultimate 64 from amd 64
3200 to the amd x2 dual core 64 4200 and when i booted up for the first
time vista says searching for new drivers to install for my new hardware
then comes up failed for unknown device.!!!! tried searching on amd
website and on windows update but no driver for processor . I run a dual
boot with xp64 and vista64 when i booted ino xp it said installing new
device then came up ok device installed . When i go to device manager in
vista the new processor has no driver 4 it do i need to worry or just
keep using ? seems to run ok in vista but i cant figure out why vista
didnt recognize this processor and xp does ..


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mowgs69