Why is my final swf so slow/stuttering?

Question

Need help cause Im going out of my mind.
I have created a webpage with some frame by frame animations
and
I've tried it in Flash at different simulated download speeds
and it works perfect.
But when uploaded to internet it runs like slowmotion in both
Firefox and IE
To be honest Ive never seen any flash movie run that slow.
To make sure the whole file is fully loaded Ive put all
content on frame 2 and a
preloader on frame1. Same thing when previewed in
Dreamweaver.
The file is 150kb which shouldnt be to big
I used 30fps originally but also tried 20fps but problem is
still there.
Is Flash Player in Firefox and IE that much slower than
regular Flash player
if you open up the file from your harddrive?
Any tips cause Im considering to never touch Flash again :(
So much hard work for nothing :(
Thx for listening/ AquaStealth

Answer 1

I found the answer but it was far from obvious.
When you publish your file there is an option called "window
mode"
in the html settings it should be set to any of the
windowless settings
otherwise your animations will play really slow and stuttery.
I can not for any reason understand how adobe can be (sorry)
dumb enough
to put the default setting to window when it produces such
extremely
bad results. I can imagine a lot of poeple are unaware of
this and that it
causes a lot of unnecessary trouble.