Using the MS sync fx, some changes fail to apply

I'm using the sync framework to sync between an SQL-Server and an SDF. I'm using VS-2010 Local Database Cache to do the actual sync, with the ConflictResolver set to client wins.

I tried to sync changes between the two, having modified only one side, and yet some records fail to sync to the other side (from SDF to SQL). In the SyncSta开发者_如何学JAVAtistics returned from the Agent.Synchronize() method, I saw that the SyncStatistics.DownloadChangesFailed value was set to 9.

I could not however glean any more information.

Can anybody help me understand this? I don't think there should be a conflict here, but if there is - shouldn't the Client-Wins setting be sufficient?

Thanks in Advance, Assaf.

Turns out that I forgot to add server side handling of conflicts.

Adding that, I got everything to work. Assaf