SWF plays slow in html

Yo yo, :mu:

I searched the forums first and couldn’t find anything.
I’m sure you have come across this before, it’s a pain.

I have used flash for years and came across this problem before but can’t remember how I solved the issue.

Finished my flash intro:-
30sec long.
preload of 1 second (56k).
25 frames per second.
swf 63.5k.

The swf plays perfectly until I embed it in a html page where it just runs well, just **** terrible, really slows down (machine specs are not an issue, and the swf plays fine on its own).

Cheers