I have a similar form with a grid and a delete command button. In the click event I have:

mval=messagebox('Are you sure?',36,'Delete Record Question')

if mval = 6
delete
endif
thisform.grid1.refresh
thisform.grid1.setfocus


Set deleted is on. I think the thisform.grid1.refresh (your grid name may vary) is what you are missing??????? It seems to work for me.

Hope this helps!

Tom