Sounds like Reggie's got it right on the respirator. I keep my goatee short so that my respirator can get a good seal under my chin. What you'll want to do is "clear your mask". While wearing your respirator, breath out while holding your hand over the exhalation port...you shouldn't be able to blow any air out of the mask. Then cover the filters completely with both hands and suck in...again, you shouldn't be able to pass any air through the mask.
If you can, the mask isn't sealed against your skin properly. Readjust and try again. It should be a relatively simple process, and once you get used to it, it'll go quickly. Make sure it fits before continuing to use it...if you still can't get it and are still smelling fumes, try a different mask. Your respirator is your best friend when dealing with these noxious chemicals.
Best of luck!