Unable to stop agent / start agent!!!

Hi
one of the process emagent is running. Even when I issue command kill -i PID. that is not getting killed.
oracle 3309 1 0 Mar 30 ? 8:49 /opt/oracle/dbms/agent10g/bin/emagent
kill -9 3309 # no use :(
When I try to stop. start and status of emctl this is what am getting.. I am giving emagent.trc as well.
Any inputs helpful.. thanks in advance..
> emctl stop agent
Oracle Enterprise Manager 10g Release 10.2.0.1.0.
Copyright (c) 1996, 2005 Oracle Corporation. All rights reserved.
> emctl start agent
Oracle Enterprise Manager 10g Release 10.2.0.1.0.
Copyright (c) 1996, 2005 Oracle Corporation. All rights reserved.
Agent is already running
> emctl status agent
Oracle Enterprise Manager 10g Release 10.2.0.1.0.
Copyright (c) 1996, 2005 Oracle Corporation. All rights reserved.
Error connecting to http://hqadrdu1.tnt.agedwards.com:3872/emd/main/
emagent.trc out
2007-03-30 14:10:52 Thread-5613 ERROR pingManager: nmepm_pingReposURL: Error in request response. code = 400. text =
2007-03-30 14:11:20 Thread-5622 ERROR http: snmehl_waitfds: None of the specified sockets has activity
2007-03-30 14:11:20 Thread-5622 ERROR http: 2275: Error reading secondary header(s)
2007-03-30 14:11:20 Thread-5622 ERROR http: 2275: SNMEHL_READ_ERROR
2007-03-30 14:11:20 Thread-5622 ERROR http: --- Error context dump begin for incoming request ---
2007-03-30 14:11:20 Thread-5622 ERROR http: version=http/1.1 secure = 0
2007-03-30 14:11:20 Thread-5622 ERROR http: primary header = status /emd/main/?X-ORCL-EMOV=4%2e0%2e0&X-ORCL-EMCV=10%2e2%2e0%2e1%2e0&X-ORCL-EMSV=10%2e2%2e0%2e1%2e0 HTTP/1.1
2007-03-30 14:11:20 Thread-5622 ERROR http: --- Error context dump end for incoming request ---
RK

You will need to go to the server that has the OMS and unregister this agent. Sadly I don't remember the command to unregister an agent of the top of my head.
This also means you have a configuration error with your agent.

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