Try setting the DNASs YPort to 666.
Check out the DNASs sc_serv.ini/conf configuration file for the section (default shown below):
; Yport, port to connect to yp.shoutcast.com on. For people behind caching
; webproxies, change this to the alternate port (666 is what it might be,
; check www.shoutcast.com if you have problems). Otherwise, leave this at 80.
; We're actively working on re-opening port 666, but as of release the only
; working port is port 80.