Massive graphics lag in Rainbow Six Vegas 2

[jacksonc]

Hi

I just got a 2008 version of rainbow six vegas 2 and the first time a started it up it worked great!
I then had to go to bed and the next morning i adjusted my graphics options (I have a ati 256MB graphics card) and ever since then it has been very laggy/slow in responing.  The music is playing fine but the graphics are just so laggy! 
I belive my computer can handle it as it has done it fine once so what when wrong?
I adjusted my graphics to be of a better quality and yet somehow it made the game worse (when i reopend it)
I have tried returing it to the graphics original state and have unstalled and installed twice
Does anyone one know what is wrong and if i can fix it?

Thanks.

[kpac]

Go here (http://www.systemrequirementslab.com/cyri/), select the game and click the button. Do you meet recommended requirements?

[2x3i5x]

Here are the minimum and recommended specs they listed for Rainbow Six Vegas 2... also, my pc has a Nvidia Geforce 9500GT graphics card and canyourunit tells me that it meets recommended specs, so if you have some similar gfx card, it should work.

Minimum Configuration:

CPU: 3 GHz Pentium 4 Hyper Treading or AMD Athlon 3000
Operating System: Windows Vista/Windows XP SP2 (only)
Memory: 1024MB for Windows XP / 2048MB for Windows Vista
Drive Space: 7 GB
Graphics Card: 128 MB DirectX -compliant, Shader 3.0-enabled video card
Sound Card: DirectX-compliant sound card
DirectX version: DirectX 9.0c (included on disc)
Recommended & Preferred Configuration:

CPU: Intel and AMD processors 3.2 GHz
Operating System: Windows Vista/Windows XP SP2 (only)
Memory: 2048MB
Drive Space: 7 GB
Graphics Card: 256 MB DirectX -compliant, Shader 3.0-enabled video card
Sound Card: DirectX-compliant sound card
DirectX version: DirectX 9.0c (included on disc)]

[jacksonc]

i found out why it was lagging.  Thanks anyway