I have the Jaton Video-208PCI
At the moment there is no support for the GeForce MX4000 fir Windows 7 64bit. As this card is quite old it is very likely that there won't be a driver for it for it in the future.
Here is a list of better(newer) graphics cards that will support Windows 7 64bit:
GeForce 6 Series - (GeForce 6200, GeForce 6600GT, GeForce 6600 and GeForce 6600 LE)
GeForce FX Series - (GeForce FX 5950 Ultra, GeForce FX 5900 Ultra, GeForce FX 5900, GeForce FX 5900 XT, GeForce, GeForce FX 5700 Ultra, GeForce FX 5700, GeForce FX 5700LE, GeForce FX 5200 Ultra, GeForce FX 5200 and GeForce FX 5500)
You can get a GeForce FX 5200 for as little as $18 on ebay. So upgrading a little won't hurt.
on Dec 11, 2012