Bluetooth won't connect to new device

[Bluetoothfail Lurker Find all posts View Profile Close Bluetoothfail]

Having a great deal of trouble with Bluetooth. Following the instructions, I should press the off hook button on steering wheel and then be able to rotate the tune/sel knob to select options. However upon pressing the off hook button, all I get is "not linked/phone" on the screen and rotating the knob just causes it to beep at me and I get no options.

Any ideas?!
TIA

[Piggy Water pistol pilot. Find all posts View Profile Close Piggy]

Link the phone to the head unit first.