Defined form doesn't show as available

I've used Server Properties to set up a new form. However, when I
right-click on a printer and choose Printing Preferences/Advanced, the form
doesn't show in the drop-down list, nor does it show anywhere under
Properties.

I know I've done this in the past, and it's worked, so I can't figure out
what I'm missing here. I have Administrator rights.

Thanks,

Kevin