Help using this stream with rtmpdump

[bentzi]

Hi, what do I need to do in order to use this link on rtmpdump (it's an rtmp server): http://fms3.mediadirect.ro/live3/.....

second question is about this stream, from the same source, which works for me only for 17sec-
rtmp://fms30.mediadirect.ro:1935/live3?id.....
Connecting ...
WARNING: Trying different position for server digest!
INFO: Connected...
Starting Live Stream
INFO: Metadata:
INFO: framerate 25.00
INFO: width 640.00
INFO: height 360.00
INFO: videocodecid avc1
INFO: videodatarate 512.00
INFO: videokeyframe_frequency125.00
INFO: audiocodecid mp4a
INFO: audiosamplerate 48000.00
INFO: audiochannels 2.00
INFO: audiodatarate 64.00
955.661 kB / 15.74 sec
ERROR: RTMP_ReadPacket, failed to read RTMP packet header
962.003 kB / 15.82 sec
Download complete