?!?! utterly confused by disappearing graphics in IE5(mac)... HELP!!!!

Hi everybody....

once again I'm stuck with a weird problem that seems to have me running around in circles without ever finding a solution.... - so please have mercy....!!!! :confused:

I'm setting up a website for a college course - using both flash (using flash MX) and html. I have 2 sepaprate flash files - one for a banner - one for the main menu, button targeting 2 iFrames inside the html page which works fine.
The problem is that for some strange reason - which only happens in Internet Explorer5 on the mac - when a button is clicked the banner disappears, not completely though, a little time display that is in the banner file remains visible while the other graphics vanish....
Have a look... (site still work in progress as far as content is concerned, main pages in place though)
http://www.graphiceyedea.co.uk/inm/main.html

I've tried what feels like a million different set ups with no success...... any ideas or thoughts on this owuld be much appreciated ;)
Thanks ;)

You may accentuate one note on start of your site:
Welcome and please all of you who have IE5 update your IE on this link, to preserve problems durring sightseeing our site.
Thanks for understanding,
Web Master.
:D

thanks for that ;)

of course there would be that option ;) - trying to avoid that ;)

and since it seems there will no onger be standalones or new upates for IE for the mac - that would leave the mac people out in the rain again - I know what that's like.... so...... I'm still tryign to find a solution....

thanks though :)