nVidia 9650M GT with aspire 5920g problem

I have an acer aspire 5920g that had a nVidia 8600M GT 512Mb and this card died. I had bought from ebay a nVidia 9650M GT 1Gb and I put it on the laptop. :thumbsup:
My problem is that the system recognize the card as a typical adapter.
I downloaded the nVidia drivers but in the check for compatible hardware stops telling me that no compatible hardware found.
I flash the bios with 5920G_MXM_V3 but the problem is remain. The only drivers that working is ver.259.47
Why is this happening and how can I install the newer version drivers?

 

Try modified inf file from laptopvideo2go website.

 

I try that but the problem remand.
I think is vbios of my cart.
I have the " 62.94.39.00.00 " and I am looking for another version but not find.

 

Finally I install the drivers with this tip http://forum.notebookreview.com/acer/444579-nvidia-9650m-gt-ddr3-acer-bios-5.html#post6892905 but now I have problem with flickering and the driver is unstable

 

Try applying the PCI-Express x16 fix to your vbios with NiBiTor.

EDIT: See here for instructions: http://forum.notebookreview.com/ace...-vs-nvidia-geforce-9600m-gt-512mb-ddr3-2.html