since 4 months i have a problem. I cant test my apps from qtCreator via USB on my Nokia E7.
E7 was new flashed. QtCreator is up-to-date.
QtCreator recognise the phone if its pluged in.

On the config window "symbian-devices" > "Run" > "Communication Channel" > "Serial: Serial port: Nokia E7-00 USB Serial Port (COM2)"

On click at the testbutton in the corner i get a message with a red background: "The port COM2 could not be opened: Port in use"

What can i do?!

QtCreator: 2.4.1 (Qt 4.7.4 32bit)
E7: Symbian Belle / 111.030.0609