For starters ...
1 - stop the repagent
2 - start the repagent
3 - review the dataserver errorlog for any messages (generated by step #2) that could explain if/why the repagent is having problems connecting to the repserver
Also, make sure the repserver is accepting connections from the repagent ...
resume log transfer from syb157134.pubs2
... and review the repserver errorlog for any related error messages.