Agentry exception

Hi,

I have been working with Agentry server smoothly but all of sudden my Agentry server has started to throw the following exception:

Exception: 20(Agentry3), NOServerUser(), agent\armsgs.cpp#620:ARBusinessObjectFetch::createObjects. [ from Agentry Administration Client]

I have observed that I get this message when I am transmitting via ATE, the applicaiton server is very slow often gets Session Timer for User: "USERID" ending [From AgentryServer.exe]. 

On ATE client I am getting error This client is not logged into the server(2).

I have not changed any config under ini files like Agentry or JAVABE.

I have tried to restart the server, I also reinstall the ATE client.

Agentry version:

Agentry Server Name=SMART Work Manager for SAP Server v5.1.0.0