Office Politics

I work as a team leader for an online business coaching department. I have been at this position for about 7 months now and prior to that I was a coach. I would consider myself a fairly valuable asset to the dept. I deal with a lot of issues both client and employee.
My work is what I would consider exemplary.

So enough with the exposition...

Today I come to find that our company is introducing a new campaign related to repairing credit and that we are going to start training this coming week. Being the forward thinking person that I am and knowing the possibility for job advancement, I volunteer to go into the training.

Unfortunately my request was denied.

Why?

Probably for a number of reasons, but with as long as I have been with the department I was a bit disapointed.

This also adds to a fear of mine.

A fear that has been clawing at the back of my skull for the passed 3 months.

I am stuck on a plateau.

It is over for me, there is no advancement.

I am pinned against a shatter proof glass ceiling.

This is quite a depressing revelation, especially for me.
I need to have challenges. I need to be able to progress.
It is part of my character. If I stay stagnant for too long then I will lose interest and become disenfranchised.

I love what I do.

I enjoy the people I work with, but just like in Fallout 3 once you reach level 20, what's the point.