FMS 4.5 HTTP Live Streaming stops after 30 minutes

Using FMS 4.5.2, I am streaming live via rtmp and http.  My rtmp stream is flawless and works 100% of the time, but my HTTP stream seems to always just stop after about 30 of encoding, although the encoder continues to run and has not crashed. When I stop the encoder and restart it, the HTTP stream picks up again and starts show the live stream but stops after 30 minutes or so everytime

Any ideas what could be causing this and how to fix it?

NOTE: I am seeing this error in my core.00.log file:

NOTE #2: I am currently using the Development version awaiting a serial number from the client.  Does this have anything to do with what I am experiencing?