Hi Birdy,
I don't see any alert except the current one of windows7 telling that i've not a mail client to support synchronisation, but we don't need to. Then i click Ok and that's it. And when the two synchronisation were working fine, i had this alert too.
I just see the synchronisation running, and never ending, not synchronising anything

When it was working i could see the synchronisation running, the elements synchronising, and i could see the messages of birdie sync. Now i don't see any messages of Birdie Sync.
I think the problem could come from a recent instalation of microsoft office. I never opened Outlook, but i think maybe it messed up something. I uninstalled office but the probleme is still here. Not sure it has something to do with it.
I will send you my logs tonight. Thanks for your quick answer.