Listener is not connecting... please help

Listener is not connecting... please help

/home/oracle/>lsnrctl status LISTENER

LSNRCTL for IBM/AIX RISC System/6000: Version - Production on 05-NOV-2008 08:34:52

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Connecting to (ADDRESS=(PROTOCOL=)(PORT=))
TNS-12547: TNS:lost contact
 TNS-12560: TNS:protocol adapter error
  TNS-00517: Lost contact
   IBM/AIX RISC System/6000 Error: 73: Connection reset by peer
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one simple reason for this could be that the listener.log file has reached a size limit (ulimit -n) or that its filesystem is full.
It's usually $ORACLE_HOME/network/log/listener.log.

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... one other, not uncommon reason could be that the listener tries to connect to a busy port.
You could check this by comparing your listener.ora settings with 'netstat -an'  output.
I think you should post your listener log file, so we can find more detail in your problem. May be you lost config in tnsname.ora, example :

                (SID=listener) --or depend on your system
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