Todo+Cal+Sync does not sync contacts

[Pachat]

Hi,

I just bought Todo+Cal+Sync on my IPhone 3 GS.
Works great for tasks and calendar (my server is eGroupWare 1.6.on PHP5).

With contacts, when doing a sync,
1°) iPhone => server : it sends the contacts but with no phone numbers
2°) server => iPhone : it ends in "Invalid data" and receives nothing from it.

Any help ?