cant play fallout 3 on eyefinity....

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okey i just setup my tv and now i have 3 monitors all difrents resolutions and size... so i want to play fallout 3 w eyefinity but i cant :S... i did the creategroup whaterver thing on the CCC... im "eyefinitying" right now on windows 7 but everytime i open Fallout 3 the monitors duplicate soo :S.. how i can fix that?...