Changing a subform's presence based on drop down selection

for some reason I cannot get this subform to go visible on my form. I'm using formcalc. Here is my formula:

if (xfa.event.newText == "Round") then (form1.ProductWorksheet.ProductInformation.Product.Shape.ShapePics.Ro und.presence == "visible") elseif (xfa.event.newText <> "Round") then (form1.ProductWorksheet.ProductInformation.Product.Shape.ShapePics.Ro und.presence == "hidden") endif

I've put this formula on the "change" event on the drop down. My scripting language is set to formcalc as well. Please let me know if I'm missing something here. Thanks!