FMS 4.5 live long play client

Hello, all!

Please help me solve the problem.
I have an instance Flash Media Interactive Server 4.5 under OpenSuse Linux
And some clients who pull live streams for a long time, but regularly, about once a 6 hours (around) they fall off with error "socket timeout" (tested under vlc & rtmpdump from neighboring server).

In the event log (application log, onDisconnect) I can see only disconnect event, but in t the access log I see stop event and, after, disconnect

Tell me if there are any timeouts in configuration or this is a "feature" (or special setting)?

Thanks for answers!

Juri