devloper -2 Newbie Poster

in visual studio 2010 i make a set up project..if i give administrator rights it run successfully in windows 7 but without administrator rights UAC display and ask adminstrator password..so i add manifest file in my WPF project and

write
<requestedExecutionLevel level="highestAvailable" uiAccess="true" />

and build my project then after when i install the set up UAC ask administrator password?? why this happen??manifest is not build properly or anything happen?? what can i do for that?? thanks..