ISW Sync halts

I have ISW syncing from AD to Sun DS. It stops syncing without much information in the ISW logs. In the Sun DS Error Logs, I see the following events.

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[19/Oct/2006:14:57:31 -0400] - WARNING<38781> - isw - conn=-1 op=-1 msgId=-1 - Plugins TCPSocket.cpp:210(logCode=2105, connectionID=0) Failed to connect to ldapisw1.simple.net:7388 because 'NSPR: Connection refused by peer ' (-5981)

[19/Oct/2006:14:57:31 -0400] - ERROR<38747> - isw - conn=-1 op=-1 msgId=-1 - Plugins unable to establish connection to DS Connector at ldapisw1.simple.net:7388, will retry later

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Any ideas. I saw similar events in the Forums, but I do not see any clear solution for this issue. Please help.

[758 byte] By [Tron1] at [2007-11-26 10:59:13]