02-29-2012 01:53 PM
Welcome to the BlackBerry Support Community Forums.
The password used to connect to the BlackBerry® Desktop Software would be the BlackBerry® smartphone password.
If the BlackBerry smartphone password is numeric and the Alt key is not pressed when typing the password, the password entered is alphabetical, not numeric. Another possible cause is that the BlackBerry smartphone has the CAP lock or NUM lock turned on.
Please have a look at the following article that may provide some assistance:
BlackBerry Desktop Manager or the BlackBerry smartphone does not accept the correct BlackBerry smartphone password
I hope this helps,