Vista - Playing Games on Live Messenger

I have just installed the latest version of Windows Live Messenger. When I
invite my contact to play A game such as Tic Tac Toe a screen is displayed
asking me to confirm my Hotmail password, which I do but then there is just a
white screen. the game never loads. I'd appreciate any suggestions as to how
this can be remedied. Thank you
I have Windows XP media Centre 2005 SP3. I use Firefox as default browser but
even when I change to Internet Explore 8 the same problem occurs. I also have
Norton Internet Security 2008 running. Though it is probably of no relevance I
should explain that my email (via MS Outlook) and online browsing whether with
FireFox or IE* all work satisfactorily.


Gerry Atrick