My Flash RSS Reader - works only sometimes

[FONT=Times New Roman][SIZE=3]I have created a Flash (CS4) RSS Reader using actionscript 3 and posted the reader at the following URL: http://pacificempirecorporation.com/rss/rsstest.html[/SIZE][/FONT]

[FONT=Times New Roman][SIZE=3]On my home computer (Windows Vista) I can view all the Feeds in both IE and Firefox.[/SIZE][/FONT]

[FONT=Times New Roman][SIZE=3]Two other people I asked to test it (both using Windows XP) can view all but 4 of the feeds in IE (Sports, Lifestyle, Strange, Internet) but they can view all the feeds in Firefox.[/SIZE][/FONT]

[FONT=Times New Roman][SIZE=3]Can anyone help why this might be? The .fla file is larger than the max filesize to include here, so if you need to view it you can get it from my rss directory (it’s viewable) - the code you would want to look at would be the middle line rss content (rssfeedmc movieclip).[/SIZE][/FONT]

[FONT=Times New Roman][SIZE=3]Also can anyone let me know if they can view the feeds and if so or if not, include what browser and OS you are using?[/SIZE][/FONT]

I’d appreciate any and all help I can get with this.
[FONT=Times New Roman][SIZE=3]Thank you![/SIZE][/FONT]