oclhashcat+ error in win7x64 ATI

[guantun]

I am using oclhashcat+ 0.3 in a Windows 7 x64 machine with 11.7 catalyst drivers installed

When I try to use oclhashcat+ get the following error:

Code:

Platform: ATI compatible platform found
ERROR: clGetDeviceIDs() -1

I'm doing anything wrong or I forgot something?

Thanks in advance,