Problem with nvidia drivers on my laptop

Hello,
I've installed Vista on my laptop (FSC amilo M3438G) and it works great!
The only problem I have is that I cannot install drivers from nvidia
(v88.61) for my video card (GeForce Go 6800). The installation seems to be ok
but at reboot, the driver do not start (code 43 error)
The only working driver is 72.30, and it doesn't allow Aero visual style!

Does anyone know what is this code 43 error, and how can I fix it??
Or maybe is there another way to activate Aero?

Thanks!
Inge06