Just bought my first BB, used off ebay, and its misbehaving -- spontaneously rebooting. I hardly know anything about BBs so I started with DLing the device manager, etc. I plugged BB it into my comp and ran the app loader wizard, but can't get past the communication port selection. The drop down box for connection is completely blank, and the detect communication port box cannot be checked. My comp does detect the BB thru the USB port and I was able to do an update thru the desktop manager, but that's it. Why can I not select a connection?? The BB is functioning fine other than the rebooting every so often.