Hi Optimus, I have encounted this same trouble with a brand new bottle of Paul Smith Extreme in the past. Give this a try:
Carefully remove the spray cap from the bottle.
Run it under very warm running water for a minute or so.
Replace the cap and spritz a few more times.
If this fails, remove it again and GENTLY insert the tip of a fine pin or needle into the hole in the front of the cap.
Basically its normally a blockage that creates this superfine jet of fragrance instead of an impressive plume.
If this also fails, return your cap and bottle to your nearest Mugler stockist with an Angel Ambassador, as the company prides themselves on replacing faulty caps for both Angel and A*men products (I used to be an Angel/Amen Ambassador several years ago).
Lemme know how u get on.