Problem in running a Flash MX-2004 application on Windows 98 adn Windows NT

Hi all
I have this problem …here it goes…
Actually I developed a Flash MX-2004 application which has to run on both mac and windows platforms.
This application does the funciton of a dictionary and has 46 xml files and close to 13000 sound files.
This application runs fine on most Windows platform, however it doesnt work on Windows 98 and Windows NT where though the intro animation comes & the home screen loads…the application part of the program doesnt load.

Why is this so??? I am totally clueless…please help…
Do I have to make the intro and exit animations as separate swf files adn call them???
Please help…