Yeah, I tried to push it in with my hand, but it's firmly stuck in the position.
I hate to say this, considering what hell opening up a Vulcan is, but you're going to have to open it up and take a look. I'd venture to say a piece has snapped inside, but I can only guess based upon a similar experience. Once you open it up, take pictures of anything that appears out of the ordinary, and then maybe we can help you diagnose the problem and find a solution. I'd recommend the search function, but I'm unaware of any threads regarding this.
Ugh I was afraid of that...
I guess I'll try and snap some pictures.
Thanks for the help.