AD Replication - DCDIAG

I need some help deciphering the output of my DCDIAG, please. I have
included a snippet of some of the warnings/errors. I can provide the entire
output if needed.

Thanks in advance

Testing server: OK\DC01
Starting test: Replications
REPLICATION-RECEIVED LATENCY WARNING
DC01: Current time is 2006-07-25 08:02:29.
DC=ForestDnsZones,DC=my,DC=domain,DC=net
Last replication recieved from PROJECT at 2006-03-24 16:51:48.
WARNING: This latency is over the Tombstone Lifetime of 60 days!

DC=DomainDnsZones,DC=my,DC=domain,DC=net
Last replication recieved from PROJECT at 2006-03-24 16:51:48.
WARNING: This latency is over the Tombstone Lifetime of 60 days!

CN=Schema,CN=Configuration,DC=my,DC=domain,DC=net
Last replication recieved from PROJECT at 2006-03-24 16:51:47.
WARNING: This latency is over the Tombstone Lifetime of 60 days!

CN=Configuration,DC=my,DC=domain,DC=net
Last replication recieved from PROJECT at 2006-03-24 16:51:47.
WARNING: This latency is over the Tombstone Lifetime of 60 days!

DC=my,DC=domain,DC=net
Last replication recieved from PROJECT at 2006-03-24 16:54:21.
WARNING: This latency is over the Tombstone Lifetime of 60 days!

Starting test: Advertising
Warning: DC01 is not advertising as a time server.
......................... DC01 failed test Advertising
Starting test: systemlog
An Error Event occured. EventID: 0x00000457
Time Generated: 07/25/2006 07:38:20
(Event String could not be retrieved)
......................... DC01 failed test systemlog
____________________________________________________________________
this output is from another domain controller

Starting test: systemlog
An Error Event occured. EventID: 0x00000457
Time Generated: 07/25/2006 08:15:38
(Event String could not be retrieved)
An Error Event occured. EventID: 0x00000457
Time Generated: 07/25/2006 08:15:46
(Event String could not be retrieved)
An Error Event occured. EventID: 0x00000457
Time Generated: 07/25/2006 08:15:50
(Event String could not be retrieved)
......................... DC02 failed test systemlog


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