Because the Apple \\c has a few architectural differences from the \\e and the Macintosh (which I assume the M0100 was probably designed for) I would suspect that the mouse controller architecture is just enough different to make the mouse not work as it should.

That being said, I'm definitely not an expert on the subject, so it could possibly be that the mouse is defective. If you have an older Compact Mac that accepts the db-9 mouse that would be a sure fire way to test it...

-Academician