ATI card problem Please Help!

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Joined: 16 Mar 2006
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I have got ATI Radeon Xpress 200 Graphics card on my system I have Trainz Railroad Simulator 2006 installed on my system when I launched it first time it checks my system config it displays Pixel Shader Ver: 2.0 and Vertex Shader Ver: 2.0 and when I go to www.systemreuirementslab.com/referrer/srtest and test Battlefield 2 for compatibility for my system it shows Graphics card is not compatible because Pixel Shader Ver: 1.4 and Vertex Shader Ver: 1.1 why so ? Pleeeeeeeeeeeeeeeeeeeeeeeeeaz answer.