RTMP Stream is being dropped

Hi, I’m using Elemental encoder to ingest RTMP signals on EMS. Things are going fine until EMS dispatch the error below and close the stream connection to the encoder after a considerable period (a hour or so): evostream.log.2168.1370813362228.log:1370814708:2:/applications/evorouter/src/protocols/timer/keepalivetimerprotocol.cpp:87:TimePeriodElapsed:No traffic on stream INR(320) with name `estudiocgjrj_2564` from protocol OR(34281). Destroy it evostream.log.2168.1370890623659.log:1370892628:2:/applications/evorouter/src/protocols/timer/keepalivetimerprotocol.cpp:87:TimePeriodElapsed:No traffic on stream INR(853) with name `estudiocgjrj_3564` from protocol IR(153289). Destroy it Can someone tell me what’s happening? Thank you!