Project Paint 2.6 not working

Hi guys, I’m new to Blender…
I imported a mesh from another 3D package and I want to use Project paint to stencil some textures using Photoshop CS4… I click the “quick edit” button and PS loads the image, then I paint on a new layer and save the image… but when I click “Apply” nothing happens…
I tried on 2.63 and 2.64rc1 with PS and Gimp but had no luck…
What am I doing wrong? :smiley:

No one can help me?
If it helps I’m on OSX 10.8…
Thank you.