GoldenGate

i already set the golden gate and its work normally no error for several days..
but suddenly pump abended n there is an error :

EROR OGG-01224 TCP/IP error 101 (network is unreachable)
2012-04-18 10:14:08 EROR OGG-01668 SRCPUMP.PRM : PROCESS ABENDING

i have already set autorestart at parameter MGR
so after srcpump abended, for 3 minutes the srcpump restarted automatically

but there is another error:
10:17:08 ERROR OGG-01033 Oracle GoldenGate Capture for Oracle, srcpump.prm:
There is a problem in network communication, a remote file problem, encryption keys for target and source do not match (if using ENCRYPT) or an unknown error.
(Remote file used is /oracle/product/test/dirdat/bb000118, reply received is Unable to lock file "/oracle/product/test/dirdat/bb000118" (error 13, Permission denied).
Lock currently held by process id (PID) 2980).

and then srcpump restarted automatically
and Lock again

and its looping again and again
after i wait for about 2 hours then suddenly

INFO OGG-01057 Oracle GoldenGate Capture for Oracle, srcpump.prm: Recovery completed for all targets.

But sometimes when looping eror like that, suddenly appear error Network is Unreachable again so its like the looping will repeated again from the beginning.
Because of that i definitely don't know when the pump will running normally again..

i really don't undestand why happend like this.. Please help me..

thank's