Problem connecting to http stream

I have the following stream format: http://IPADDRESS:80/sdp/mpu001_ch0_dest0.sdp. In VLC it works. In Wowza it shows Active but with no bytes are comming in. I checked the logs and the camera responds with 200 which is ok. I tested with all media casters: with RTP (active, but no bytes comming in), with shoutcast (super low speed and very few bytes comming in. Eg.: Bytes In: 8512 @ 1.390 Kbits/s << up for about one minute). Waiting for stream on the rest.

RTSP is not possible with this cameras. They are Sony IPELA.

Firewall? Have you tried with just a browser and network analysis software (e.g. performance monitor or sysinternals toosl) etc? Maybe the port 80 stuff is just for negotiation and there is another port for mass data transfer?