I forgot: what format do you dld? .mp3?
That file format should (of course) be recognized by Quicktime but others like .m4a and .ogg or .wma I'm not too sure about (actually, I know for sure that .wma is not playable by Quicktime...)

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iMac G4 OSX 10.3.9
RAM 256MB
LW 4.10.5 Basic
ADSL anything from 3 to 8Mbps/around 1024kbps

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And seal your fate forever
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The Golden Age Of Leather"
-Blue Öyster Cult-