I have purchased this product as it is a dual dock for Apple and Android devices. I have a Samsung Galaxy S3 and S4 when I dock the S3 it charges and I can play music through the system, however when I dock the S4 it charges but I can not play music through the system the S4 just says that Audio file is not compatible with the system even though the same files play through the S3. I can play music though the system but broadcasting to the unit through bluetooth. Any suggestions from anyone would be most welcome

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