Air Video stops after 30-35 minutes

Each time when I play a video with live conversion the video stops after exact 30-35 minutes.
Then the videoplayer quits itself and I have to start all over again. Sometimes I get the message that there is an error loading the material.

What can be the problem? And how can I solve this?

Hi,

does it make any difference if you restart the device? iOS media player does this sometimes, but I can't tell for suer that it is related.