I had commented a few lines out in my .htaccess file on the root. It was these lines:
<Files 403.shtml>
order allow,deny
allow from all
</Files>
I restored these lines and now it works.
Thanks anyway,
Tim
What you need to get it to work at, is inside an HTML document as eg in the way of my Testflash.html example.
I don't know anything about Flash, but it seems to me, that this is a Flash problem. If you can make a bare html page with the flash object working correctly in, you would also be able to integrate it in XOOPS.