I am trying to use RSYNC to sync two Netware 6.5 SP5 servers over a WAN

I am having a problem with the initial copy. I am trying to copy about

It copies files and runs for a while. But, it just stops copying. The log
on the receiving end shows the last file copied, which matches the second
to last file listed on the 'RSYNC Client 2.6.2' screen on the sending
server. Sometimes I get about 5GB copied before if stops. For example,
the last file copied today was at 11:13am. It's now 12:47pm and the
screen showing copied files has not incremented.

Does anyone know why it would just stop copying ?

Are there any switches to help with this problem ?