Sametime on iSeries suddenly stopped

["Patrick Trapp" <ptrapp@xxxxxxxxxxxx>]

I have Sametime running on an LPAR on an iSeries that has been running 
without issue for months.  Due to other constraints, the server is 
restarted nightly.  This morning, everything was working like normal for 
the first hour or two of the business day and then it stopped accepting 
connections.  The message that shows up in the status bar of the Notes 
client when I try to connect is 0x80000223, which other sources indicate 
is "Connection refused"

I see nothing in the logs to indicate an issue and I've restarted the 
Sametime server -- nothing that I noticed during the restart messages that 
would indicate an error to me.  NETSTAT on the iSeries does not indicate 
anything listening on 1533 and I cannot telnet to that port, but I'm not 
sure that either of those are unusual because I haven't tried to do this 
during normal operation.

Any suggestions would be much appreciated.

iSeries is running V5R3
Domino 6.5.4FP2

Thanks in advance!