Error message with material selection SW2009/10 64Bit

When I try to assign a material for the part on SolidWorks 2009-2010 (64) on a Vista, I receive an error reads as:

"Access to c:\program files(x86)\solidworks\lang\english\colorwatches\dull.sldclr was denied" (Screen shot is attached)

I suspect there is a conflict between the new version and the previous 2007 version installation. I deeply appreciate if anybody could help me how to solve this issue.

Regards,

Ugras

SolidworksGeneral