I am converting from 8.5 to XI and in my 8.5 parameters I had a formula in the selection expert where

({TABLE.VALUE} = {?VALUE} OR {?VALUE}='')

bascially if they didn't choose a selection then "blank" for all values. How can this be done in XI, my formula doesn't give an error however it won't pull blank for all? I also noticed that now I have a .... in my parameter in XI and if I leave that selected then it errors out and makes me give a value?