Merge Replication Issue SQL Server 2005

I have set up merge replication with 1 publisher and 1 subscriber. Distribution is handled by a 3rd server.

I can generate a snapshot at the publisher and apply it to my subscriber. But when I insert some data (approx 30,000 rows) , the Synchronization agent gives the following error when It runs:

The merge process is retrying a failed operation made to article 'xxx' - Reason: 'The Merge Agent was unable to synchronize the row due to one or more unanticipated errors in the batch of changes. When troubleshooting, increase the -OutputVerboseLevel setting, restart the agent, and check for and resolve any errors generated by the database engine. '.

I have increased the OutputVerboseLevel setting and specified a file path in the -OutputMessageFile but the File is not being populated. All the references on books online say to put the file path in the -Output parameter but when I do it says it can only hold an integer value. So I cant see the errors generated by the database engine.

Could anybody please assist with this issue?

Thanks

If you increase the verbose level you should see the messges in MSmerge_history.

Also Merge replication doesnt use the distribution agent or much of the distribution database so its not useful to have a separate distributor.

Martin