Connection issues in DM
 

I'm a n00b to BBs and I have a BB 8820 and I recently upgraded the device software to v4.5.0.182 and the BB Desktop Manager (DM) is v5.0.1.37 on a Windows XP machine.

After the upgrade I no longer have my contacts' info and wont to restore a backup. I am unable to sync, restore a backup, check device properties, and create a backup; I get a connection or communication error.

The PC sees the BB fine, I can check the link status w/ the BB Device Manager Properties, and the BB is listed as connected in the bottom-left corner of BB DM. I can run Application Loader and delete/install apps fine.

When I run Synchronize I get a "Failed to Connect device..." error.
When I restore a backup I get a "There was a communication error between the device and the DM" error.
When I try to create a backup I get an "Error backing up database(s)" error.
When I go to Help->device properties I get a communication error.

Any suggestions? Thanks.

Did you try a hard reset yet? That is, with the power on, remove the battery on the blackberry for about thirty seconds. If you haven't tried that yet, then that's the first thing to try, and hopefully that will be the cure. .... And disconnect from the USB when you do the hard reset.