Merge agent fails due to deadlock

Hi:
I met a problem this morning. the merge replication agen stopped, the
error message shows:
The process could not enumerate changes at the 'Publisher'.
(Source: Merge Replication Provider (Agent); Error number: -2147200999)
-----
Transaction (Process ID 79) was deadlocked on lock resources with
another process and has been chosen as the deadlock victim. Rerun the
transaction.
(Source: XXXXXX (Data source); Error number: 1205)
The process was successfully stopped.
(Source: Merge Replication Provider (Agent); Error number: -2147200999)
I never met this issue before, so please help
1) What may cause this issue?
2) How I could identify which process cause the deadlock issue?
3) Is there any way to log more information to identify what resource
is deadlock, and by who.
Thanks
Yong
Yong,
have a look at enabling traceflags 1204, 1205, 3605 to get more info. Don't
forget to turn off afterwards. Alternatively if you have sql server 2005,
the profiler shows the deadlock tree graphically.
Cheers,
Paul Ibison SQL Server MVP, www.replicationanswers.com
(recommended sql server 2000 replication book:
http://www.nwsu.com/0974973602p.html)
sql