I just tested all of the %filler I typed previously, and they all worked, except "%Mr", which has to be typed as "%MR".
Do this -- copy and paste the following:
%MR
%FNAME
%LNAME
%AGE
%him
%he
%his
%Him
Now, paste it in any field. Hit Alt-RightClick and create a new template. Call it "%filler" or whatever you want and save it.
Now select and place that template and tell us what happens.