I would like to thank everyone that came to my aid with this. It certainly wan't an easy one to solve and I truly appreciate all the assistance you guys have provided.

In the end I have managed to solve it using the advice of RedWombat. I re-exported the HTML code in Flash Player 6 format which seems to be quite different. For starters, the scriptaccess command is no longer present at all.

The 2 pages still load without the www. in the address but the navbar works as it should.

Thanks once again for all your help. If there's anything I can do for you in return please don't hesitate to ask.