You could try using the modded install file (inf) from laptopvideo2go.com
If that doesn't work then it's likely 84.21 do not support your card. NVIDIA drivers are mostly backwards compatible, not forwards compatible.
i.e. you cant run Forceware 53.03 on a Geforce 8800, but you can
run Geforce 8800 drivers on a Geforce 6.