rmtpsuck works but rtmpdump with same configuration doesn't

[Vivid]

Hi, I'm trying to download rtmp stream, when I use rtmpsuck, it detects the stream and starts download it, however when I take the configuration detected from rtmpsuck and use it in rtmpdump, This output is shown.

RTMPDump v2.4
(c) 2010 Andrej Stepanchuk, Howard Chu, The Flvstreamer Team; license: GPL
Connecting ...
INFO: Connected...
Starting download at: 0.000 kB
INFO: Metadata:
INFO: trackinfo:
INFO:   language              und
INFO:   timescale             16000.00
INFO:   length                0.00
INFO: sampledescription:
INFO:   sampletype            mp4v
INFO:   aacaot                2.00
INFO:   moovposition          19764.00
INFO:   duration              0.00
0.000 kB / 0.00 sec
Download complete

part of debug output:

DEBUG: HandleInvoke, server invoking <_result>
DEBUG: HandleInvoke, received result for method call <createStream>
DEBUG: SendPlay, seekTime=0, stopTime=0, sending play: mp4:d72c/3fca/video
DEBUG: Invoking play
DEBUG: sending ctrl. type: 0x0003
DEBUG: RTMP_ClientPacket, received: invoke 140 bytes
DEBUG: (object begin)
DEBUG: Property: NULL
DEBUG: (object begin)
DEBUG: Property: <Name:              level, STRING:	status>
DEBUG: Property: <Name:               code, STRING:	NetStream.Play.Reset>
DEBUG: Property: <Name:        description, STRING:	Playing and resetting err403.mp4.>
DEBUG: Property: <Name:           clientid, NUMBER:	2646283569.00>
DEBUG: (object end)
DEBUG: (object end)

The server uses Wowza + flowplayer

I hope you can help me figure out what is causing this, Thanks.