Hello, I have the following problem: I have the COMAND APS NTG1 and a Bluetooth module SAP V2 coupled with a Samsung Galaxy S3. When a conversation comes I see the number on the display and it rings; but I can’t accept the conversation. When I press the (lister) the ‘Start’ screen from the phone appears on the display (as if I press the TEL button without making a phone call), but it continues to ring. Reject (Stop) works. Whether I press the Tas press the ‘OK’ button on the steering wheel or press the ‘OK’ button. The caller also rings the phone. If I call somewhere, I can’t hear the caller who hears me. The ‘Stumm’ button is not activated. what can it be?