When I am synchronizing the Curve 8300, it starts working properly

, then in the Calendar sync says "Reading from Microsoft Outlook Calendar" and the bar goes filling from left to right (like it is working normally), when suddenly it just simply stops and a pop up window comes with the following:
"Blackberry Desktop Manager has encountered a problem and needs to close"
Then the BB Desktop Manger closes

and my Curve stays like it is sync until I disconect it form the USB cable.
Any help on how to solve this problem will be appreciated.

Thks!!!