ASHA Hearing Aid Support FP5

I have just purchased a Murena Fair phone 5. I am deaf and cannot get the phone to connect to my ASHA hearing implant. The phone connects to the device and shows it in Bluetooth devices connected. BUT does not transmit any sound to the device. Details of the device are: Oticon Ponto 5 Super Power. Both the FP5 and hearing device are ASHA supported. I desperately need this device to work or unfortunatly my new Murena Fair Phone 5 is of no use to me. PLEASE HELP.