Media player cannot play this radio station...

Hello everyone:

I hear many radio stations trhough WMP on my mac... but this radio:
mms://radiouas.pacificnet.com.mx:8080

cannot be played... why?

what I'm doing wrong? or exists any codec package or update
available?

or what the provider are doing wrong... because many radio stations
transmit trough media player and can be heared on mac's

thanks

aldo r