your phone must be set to "usb" in the ##8778# hidden menu or you will not be able to communicate with your phone.if you are on it already switch it from uart then back to usb again,it is likley not a driver issue if you see the diag port,unless you manually installed the wrong driver.you might also check the ##debug# menu in case someone has turned dial up networking off,if i remember right it is in the "other" tab in that debug menu.however you will need the spc to get into that menu,if it has been flashed before your spc should be set to 000000 already so try that.good luck