simultaneously play a song on different computers

[Ptolemy52]

OK did that got whats below is it the I Pv4 Address or one of the others

Ethernet Adapter Local Area Connection
connection-specific DNS Suffix - : private
link-local IPv6 Address ............: xxxx: :xxxx:xxxx:xxxx:xxxx %xx
I Pv4 Address ........................... : xxx.xxx.x.xxx
subnet Mask ...........................: xxx.xxx.xxx.
default Gateway ..................... : xxx.xxx.x.x

It appears to be default gateway when I use this address I then get a box asking for the password
It then connects but no sound coming from the speakers!!!! help

I get this message on the server
:
<09/27/10@19:15:41> [SHOUTcast] DNAS/win32 v1.9.8 (Feb 28 2007) starting up...
<09/27/10@19:15:41> [main] loaded config from C:\Program Files (x86)\SHOUTcast\sc_serv.ini
<09/27/10@19:15:41> [main] initializing (usermax:10 portbase:8000)...
<09/27/10@19:15:41> [main] No ban file found (sc_serv.ban)
<09/27/10@19:15:41> [main] No rip file found (sc_serv.rip)
<09/27/10@19:15:41> [main] opening source socket
<09/27/10@19:15:41> [main] error opening source socket! FATAL ERROR! Some other process is using this port!