I know this is an old thread, but I'm having the same issue. I just purchased
http://cgi.ebay.com/USB-CHARGER-DATA...item5ad7683540
IF this is the right port; I'm going to snap some photos of the process and post up some sort of guide. After a little research it seems many people are having the same issue.
Also, does anyone know if this is caused by not using the "htc" branded cable from my phone? I have used many different usb cables over time, thinking all mini usb connections were the same...
Thanks