I use a VOIP service for my business lines. When someone leaves a message, I get an email with a .wav file attachment. My voice messages are not playing, when trying to open the attachment, I get error "Sorry, the player does not support this type of audio file." Here it gets weird, I changed my account settings (something unrelated) and got an automated message from my company in the same .wav attachment. It was able to play fine. So I looked at the advanced options of each file and they were different, although both .wav files. The file that DID play: Summary Tab Bit Rate: 64KBPS Audio Sample Size: 8 bit Channels: 1(mono) Audio Sample Rate: 9kHZ Audio Format: CCITT u-Law The File that would return an error message: Summary Tab Bit Rate: 13KBPS Channels: 1(mono) Audio Sample Rate: 8kHZ Audio Format: GSM6.10 My question: Why does one play and no the other?!?!? I'm stumped! Thanks in advance for any help.