Try downloading this:
http://www.nvidia.com/object/win7_winvista_32bit_197.41_whql.html
It's the latest driver for it. Let me know if that helps. I gotta wonder though, are you actually suffering from any performance loss? I mean does it really matter if it's only reading half the Vram? Your desktop is too bare to be that of a gamer's, and gaming is really the only time you need to get the most out of your video card that you can.
yes you are right I asking about because games become slower than before here
like pes2010 ( http://i39.tinypic.com/28lzm.png ) so that I need to get full Vram
what should I do and the link u gave me I installed it before !should I install something like PhysX will it help ?
Well for starters, PhysX won't help you because you have a hardware problem. See, the Nvidia Geforce 7300 LE has two models. They're exactly alike and only differ in Vram. One model has 128 Vram, the other model has 256 Vram, and it uses this thing called TurboCache to combine the Vram with your RAM to make it 512, however, it's still only 128 or 256 depending on your card. So basically, the issue is that your video card isn't good enough. You have the Nvidia Geforce 7300 LE which is the Light Edition, it's less powerful so that it's less expensive. Basically, all you can do is go buy a better video card. As is, you can run your game, but you'll need to turn down the graphic settings a bit. I suggest turning Anti-Ailiasing off. It makes a quite noticeable difference visually, however, Anti-Ailiasing is one of the most memory intensive graphic settings there are.
oh so this is the problem so advice me what is the best card should I buy ?
You want the best of the best? This one can take ANYTHING you can throw at it AND MORE:
http://tinyurl.com/hopeyourerich