I see three issues.
First, there is such a glut of musical talent that the only steady job that most professional musicians can get is that of musical instructor, which only serves to increase the competition within the music industry... in order to make a living with music, most professionals are turning to providing music lessons for amateurs, thus creating more musicians to compete with for pay.
The second issue I see is that you haven't yet "paid your dues" - that is, you haven't yet shown your professional chops by performing in public, whether it's soloing in a concert hall or busking on the street. You need to build up a respectable portfolio of performances before professional musicians will give you even a grudgingly small amount of respect.
The third issue I see is jealousy. The band and choir teachers from my high school never showed any respect for musicians that showed any real talent, unless those teachers could showcase that talent as products of their own teaching. A cover band making $500 per weekend gig was not worthy of their respect, but a student who could perform classical music on command was always their "pet" student (albeit still not worthy of any real respect).
So if you want to earn the respect of those instructors, don't just make a CD of your own compositions, go out and perform some of the classics. That will show them that you are a "serious" student of music, and not just (to them) another rebellious hack trying to make a name for himself.
Good luck.