My contacts and calendar not synchronizing anymore

Hello,

(first, sorry if I make mistakes as my english is not fluent).

I have an HTC HD mobile phone with Windows Mobile 6 installed. I have
Outlook 2007 installed (Office Enterprise Edition).

I dont know for which reason but actually I am not able anymore to
synchronize my phone with outlook with Windows Mobile Device Center 6.1
(on vista 64 bits).

When I connect my phone, it is well recognize and the sync process is
successfull without any errors.

However the sync is not working in both directions (neither from the
phone to Outlook and from Outlook to the phone)

What I have tried :

- I have deleted the partnership
- I have made an hard reset the phone
- I can sync from another computer so it should be a problem with
outlook I think.
- I have tried to repair Office.

Everything with no success, and the problem remains.

Thanks for your help

--
iautran