I've according to "VuMark Design Guide" and "Designing a VuMark in Adobe Illustrator" these two article's instructions try to make "VuMark" and use "VuMark-Verify" to verify the file several times, but it always shows "FAIL". I think it might have some detail that I don't understand.
Would you please provide the example file of VuMask (.ai) for us ? That will be very helpful.
My Computer is Win7 64 bit, Illustrator CS5