I received a hasselblad lens today and I put on the lens to take a look through the viewfinder and see how it looked. Afetr trying a few test shutter button pushes, I decided to remove the lens. Now the Lens wont come off. I have the LOC on O and the selector on O, no back on and when I push the lens release button it wont budge counter clockwise. Anyone have and ideas?

Thanks

David