[rtmpdump] Error when running rtmpsuck

[Michael Pogue]

ERROR: startStreaming, TCP bind failed for port number: 1935
ERROR: Failed to start RTMP server, exiting!

compiled from latest svn 2.2e (no problems)
created user rtmpsuck
redirected output with the following:

iptables -t nat -A OUTPUT -p tcp --dport 1935 -m owner \! --uid-owner
rtmpsuck -j REDIRECT (as root)

switched to user rtmpsuck

cd /usr/local/sbin
ran rtmpsuck -z

got error

HELP?