Anti-Debugging ? ?

[LOUZEW]

Hi, all
I've unpacked an Asprotected App ( advanced registry tracer 2.01)and it work fine but when i run it with Softice active, i have a big problem when shuting down this App.
An art.exe process is active and it's occupying 99% CPU time, I think it's an anti-debugging tip and i've searched for common issues, searched on this board too but i can't find anything.

Note : This prob don't appear when i'm debugging with Olly, the process is killed when i close Olly !

Does anybody have an idea ?

Thank's in advance