Have you tried to run guiminer as administrator?
Yes. I have trid to run as admin. Same result
I am using catalyst 13.1. Details:
Driver Packaging Version 9.012-121219a-152192C-ATI
Catalyst Version 13.1
Provider Advanced Micro Devices, Inc.
2D Driver Version 8.01.01.1278
2D Driver File Path /REGISTRY/MACHINE/SYSTEM/ControlSet001/Control/CLASS/{4D36E968-E325-11CE-BFC1-08002BE10318}/0000
Direct3D Version 9.14.10.0945
OpenGL Version 6.14.10.12002
AMD VISION Engine Control Center Version 2012.1219.1521.27485
I don't really get why it isn't working. Any creative solutions?