FATAL ERROR! Some other process is using this port!

[Sudzy]

I cant find an open port any way i can find one other then guessing and checking..

<12/14/03@13:31:11> [SHOUTcast] DNAS/win32 v1.9.2 (Nov 25 2002) starting up...
<12/14/03@13:31:11> [main] loaded config from C:\Program Files\SHOUTcast\sc_serv.ini
<12/14/03@13:31:11> [main] initializing (usermax:11 portbase:27015)...
<12/14/03@13:31:11> [main] No ban file found (sc_serv.ban)
<12/14/03@13:31:11> [main] No rip file found (sc_serv.rip)
<12/14/03@13:31:11> [main] opening source socket
<12/14/03@13:31:11> [main] error opening source socket! FATAL ERROR! Some other process is using this port!