Avi to Flv Problem

I have this avi thats 2 and 3 gigs or so- I used snosh to convert it to flv and I am streaming it from a server- the quality is kind of crappy- i need it to be clear and 640 x 480 or as close to that as possible- can any one help me??

go to http://goadlogic.com/man.html

and click on the bottom right btn- live video or virtual video tour-

thanx !