[Venomblood]

I have a Blackberry Pearl 8100. It used to connect to the computer and I was able to upload my photos onto my computer from my phone. A few months ago, it suddenly stopped working. I've used different computers, downloaded Desktop Manager again, downloaded drivers, used different USB hubs and cords, reset the phone, did a factory reset on the phone (just now), restarted the computer, and nothing seems to work. The phone will charge when connected to the computer, but there is no evidence of the computer itself acknowledging the phone. I really need to be able to transfer files between computer and phone, but it isn't working. Help me out here, please.