Thanks for the response! I have discovered more since then. The problem only relates to WMV files. Other files like MPG will play, but after full download as they are not pseudo-streaming video types. That is okay. The WMV files will stream if called elsewhere in normal way via in-page scripting. But, if same WMV files are played via that PHP file, they not only do not stream, they do not play at all - produce codec error. So, question is why do WMV files not play, and result in the codec error. I checked, no headers are sent before video headers sent. Happens with both IE and FF.

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Cheers,

Dan
Founder and CEO

LionsGate Creative
GoodPassRobot
Magelln