Why aren't these mate references recognized in the assy?

[razzendahcuben]

Hi,

The mate references in "screw.sldprt" are set up in a fairly sensible fashion, and yet when I drag them onto a hole in the assembly they are not recognized. Sometimes I can switch the order and get the face to recognize a coincident mate, but I'm trying to get the "drop in hole" mate icon to show up to quickly create all of the mates.

To make the assembly just open "piece.sldasm" and make a new assy from it.

Any help is very appreciated. Thanks!