wardys,
I can't recommend ansync at this point. Main difficulties are the following two.
1) GUI and documentations are in Japanese only.
2) Windows date format issue I posted the other day. (ver0.2 may solve this)
If you still want to venture into, perhaps your problem is due to the following.
Did you install both server and client? znsync server runs on Zaurus and
Here is the link to ipk. The zip file is only for znsync client to be run on Windows.
Also, PC link setting has to be 'network' (either real network or network over USB), i.e., not a USB mass-storage mode.