Stick to the animation/style..get a writer/actors
Your animation, and more importantly visual style is very good. The way you use music and the way pieces are animated are done very well with good execution. The problem is that as many have said the voice acting is only mediocore.
The main problem though is that this is teribly unfunny. The writing is in my honest opinion poor. The only moderately funny parts are those which seem to be completly random and have no relation to the actual story. It seems you use these parts as a crutch to keep the whole thing moderately fully.
The story is good, but please get a new writer...or atleast try to improve this part of your flash. The story is uninstersting without making it a commedy, but from what ive seen it is just not funny.