Expression linked to attribute not updating

NX 9 and TC 10

I created an Expression in our model seed file, called "Engrave", and it is linked to the attribute DB_Part_Name.  Initially you can create some text, and link that text to "Engrave", and extrude into the part.

BUT, when you do a save as, and DB_Part_Name changes, the expression usually won't update, even after doing a 'Force Reload Attributes from Teamcenter'.

So what am I missing here?  I was hoping it would automatically update, and save typing it manually.