I would guess that you may have not have cleaned it before loading it? That will make the air compressor trick difficult. I know that some of the Traditions models have removable plugs.
If your's is one of them: get some penetrating oil ( I like PB Blaster) and put it in a container that you can let the breech plug area soak in it. I have used a small glass jar. Let it soak a day or so and then use a breaker bar or ratchet with the appropriate size to loosen the plug. A sharp rap with a hammer on the RATCHET or BREAKER BAR seems to be the best pratice. I would never advise striking the barrel. Once removed you can then dig out the charge and ball from there. Teflon tape, commercial anti seize compound, breech plug grease, gorilla grease, TC anti size lube etc. recommended when re-installing the plug.
If non-removable: depending on how dirty the barrel was when you loaded may be the issue. If it was loaded with heavy fouling or rust, the compressor may not push out the charge. The addition of 4f into the touch hole and firing is the easiest and usually works.
If not: try pulling the ball/bullet with a ball puller. Then dig out the charge.
if that does not work: This sounds messy but is really not that bad. Go to the auto parts and get a zirc fitting (grease fitting) that fits decent in your touchhole. Sometimes the exact correct size is not available but a "pretty close" size that threads in does work. With the fitting in attach a grease gun and pump away. This will push everything out the end of the barrel. This method has never failed me. After everything is out simply use a patch and jag and push the bulk of the grease out the touchhole. The remaining grease can easily be removed with brake cleaner (Brakekleen) or another similiar solvent. Zircs are not hardened steel and will strip out if you tighten them too much thus not damaging the threads in your barrel.
I have used all of these methods repeatedlyand all work. A clean bore is the easiest to fix but we all know that "dirt" happens. I'm a pretty "frugal" guy so taking it to a shop would be very last resort for me.
Good luck and I hope ya get her running soon!