anyone know how to re-enable 'choose a connection' window when plugging into a pc???

[clhmedia]

hi all,
sorry to bother you, i have a touch pro and must have accidentally tapped the 'do not show this message' in the 'choose connection' window when you plug in your device into a computer. i went into the usb-pc settings and made sure the 'prompt me' button was checked but i am no longer getting the 'choose a connection' window when plugging in my phone to a computer. is there a other location to re-enable this? i tried finding a forum to help me out but found nothing. i rather not hard-reboot my phone just to get this message back