Hi we are trying to block Internet games that comes with Windows XP

the port are

TCP 28000-29000

We enter that in bordermanger access rules and it dont seem to work

I know that it supposed to work because i have a linksys routeur at home and
i block those port and i can't play anymore at Windows Internet game suck as
checker and backgammon

Anyone know what to do ?

Thanks

JAC