unexpected startcode 000001b7 in system layer

While trying out the latest VMPEG 1.5 player with a sample mpeg movie,
I get this message “unexpected startcode 000001b7 in system layer”, any idea
what can be done to fix it ? MS Knowledge Base has no related document.
File river.mpg with settings : ‘Audio (level 2) & Video (8bit) & WinG’
or settings : ‘Audio (off) & Video (Gray) & No WinG’, gives the same result.
“unexpected startcode 000001b7 in system layer”

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