Super tiny videos - what have i done wrong

this time?

i’m trying to load flv videos into a swf. i found a tutorial on here for dynamically loading pictures so i figured the same should work for videos - and it does, kinda. the problem is some times the videos come up full size, some times they come up really small - and while the girls find this cute, i find it annoying.

on (release) {
 } for a working example

many thanks