Radio@Netscape (real audio) Microsoft MN-500

hi

i got my Microsoft MN-500 Wireless Base set up a couple of weeks ago.
ever since i havent been able to listen to streaming real audio
anymore, which sucks a lot, since i used radio@netscape plus on a
regular basis. it will display the titles of the songs that should
currently be playing, but will not actually load or play any music. i
know that there are ways to work around this (port forwarding?). I
checked the real support (real player one) but it didnt make a whole
lot of sense to me, what i actually should do.

Could anyone walk me through the required steps, to let the traffic
through the base station? (same is true for icq file requests)

thanks in advance!
sid