Could some one here offer some guidance on my fitting a regulator to my old s310.

Some time ago I purchased an inline regulator off an auction site and have just gotten round to fitting it. Followed the destructions to the letter and I am getting a weird fault...

It don't work! I can charge the gun and both theguage on my pump and the gun read about the same bar. Up to about50 bar it works, but soon as the pressure exceeds that you can cock and fire the gun but no air comes out. Its as if the regulator cuts off the main air cylinder completely. The whole system holds air, the valve holds there is no hissing of escaping air. It just won't charge the small regulator resevoir .

Any ideas anyone?

Yorkierm