IE problem caused by Back and Forward buttons

Flash does not load immediately when pushing a back forward button in IE

[Mobull]

There is a small problem with with Flash files on the Intranet of my company. We have several Flash files on different HTML pages. The files were build with Flash MX. The code for the flash movies is like this:
<object type="application/x-shockwave-flash" data="flashmovie.swf" width="100%" height="100%">
<param name="movie" value="flashmovie.swf" />
<param name="wmode" value="transparent" />
</object>

The latest MS update ("Click to activate and use this control") is not installed on the computers. I'm sure they won't install it soon too.

The Problem:
1.) I open a page with one of these flash files
2.) I open another page with another flashfile
3.) I press the back button of IE (and don't hover over the flash movie with the cursor)

Nothing appears. Now when I hover over the flash movie suddenly it appears.

4.) I press the forward button to go back to my startpage with flash

Same problem; without hovering, the flashfile won't appear.

IE version: 6.0 with some updates (not all).

Does anyone know how to solve this?