I have the same problem with gDebugger 6.1.76 integrated in Visual Studio 2010: "the kernel uses unsupported features".
OS : Window7 64Bits
Develop tools: Visual Studio 2010
GPU Device: AMD Radeon HD 5650
Catalyst version: 13.9 (tried to install older drivers too: 13.5, 13.4, 13.2beta, 13.1, 12.4. The last one referenced in another topic, but too old to support gDebugger on VS2010 actually, I guess)
OpenCL 1.2
AMD APP SDK 2.8 (tried to downgrade to 2.6)
CodeXL version 1.2 (with sdk 2.6 should be 1.1)
gDEBugger 6.2 (standalone outside VS2010, 6.1.76 integrated in VS2010
Getting mad.