Volunteering for Airborne School but getting "no positions open" - anything else one can do?

So I have been trying to talk to my branch manager to find me a different pin point assignment in Europe and has been unsuccessful of late. The last time I talked to him I ask if I could volunteer for Airborne school in route so I could possibly go to 173rd ABN DIV. Well the response I got was first my MOS is 100% on airborne SSG's, second he told me I don't want to jump out of airplanes since it will hurt my knees, and last lee there still no positions open in Europe for me besides the one I have know. Little confused you would think he would wont more airborne qualified soldiers just like they want more air assault qualified soldiers. I don't see the problem in jumping out of an airplane sounds like a great time like repealing out of a Blackhawk. And also a little frustrated theirs still "No other openings" so I'm told.