Help with Java game animation?

I am in desperate need of some help with my java project. I have been working on it for weeks and it was going pretty well. Unfortunately I have done something that caused a key element to stop working and I simply cannot figure out what happened. The basic problem is that the strips of images I am reading in will not animate properly. The animation starts fine, then stops after a second or so on one of the toons, and the others dont animate at all until they stop moving across the screen then start their animation sequence.

Posting the code here isn't really an option, it's very long. If you're skilled with this I would really appreciate sending someone the code and having you take a look at it. Maybe another pair of eyes will help. Thank you so much. Leave your email or send me a message with your email.