I just tried to install new OS 4.5 for my 8310 and as it was installing a fatal error occurred and now have error 507. The problem is however that desktop manager won't detect my phone even though the device manager says the phone is connected to the computer. Have tried selecting the usb choice in the manager with no luck. Have tried to reinstall desktop manager and plugged the usb into every slot on the computer still with no luck. Have even tried a different blackberry and that connects to desktop manager so the problem is with my phone and is ever since the error occurred when installing the OS. Any idea's on how to solve the problem would be greatly appreciated