ARGH!

[SkylineChiliMan]

Argh, ok this problem may be really simple for some people, so I'm hoping I can get some quick help. I have a program called Messenger Plus which adds some pretty cool features to my AIM. Problem is all of a sudden today while I was using it(I have been using it for quite some time with no errors), it just decides that it will only come up in MAXIMIZED mode, and whenever I try to restore it to a smaller mode so I can alter its size, it just simply disappears. Is there any good reason why this would happen??