I have a Bcm 400 and the MOH is very low. I have tried both the audio jack and the music manager. the music going in is loud and clear and is that way if you play it on Background music through the phones but you can barely hear it when put on hold. I have rebooted and changed the audio cable on the input and also had them change the volume on the wav file for the Music manager. Any ideas how to fix this? Thank you