Help anted configuring a Belkin Cable/DSL Gateway Router

We have 1 Desktop and a couple of Laptops, all have Windows XP Pro + SP2
and windows the Firewall is disabled. We have a 1.5MB Ntl Broadband
connection via an Ethernet connected cable modem. The system works fine
all machines can access the Internet etc., and have file/printer
sharing.
My son uses WinMX in the evening on the Desktop and finds that since we
put the router in, it is now very slow. All lot of people have advised
me to configure the router' ports to allow TCP on 6699 and UDP on 6257.
Can anyone please explain in layman's terms how to do this?
--
Regards
Terry Birch

In message <(E-Mail Removed)>, Terry Birch
<(E-Mail Removed)> writes
>We have 1 Desktop and a couple of Laptops, all have Windows XP Pro + SP2
>and windows the Firewall is disabled. We have a 1.5MB Ntl Broadband
>connection via an Ethernet connected cable modem. The system works fine
>all machines can access the Internet etc., and have file/printer sharing.
>My son uses WinMX in the evening on the Desktop and finds that since
>we put the router in, it is now very slow. All lot of people have
>advised me to configure the router' ports to allow TCP on 6699 and UDP
>on 6257.
>Can anyone please explain in layman's terms how to do this?

Further to the above, I have just been asked what the bandwidth should
be set to, on the above.
Thanking you in anticipation of all replies

--
Regards
Terry Birch