format_string not evaluating

Hi Everyone, 

I have been trying the query data with my MDX cube and I have add couple new measure to it. However, none of those measure's format_string is working. I have also try same sample format_strings like

"

WITH

MEMBER MEASURES.DEMO AS 1/3

,FORMAT_STRING="Percent"

SELECT MEASURES.DEMO ON 0
from [DW DW DB]

" The query result just 0.3333333333 instead  of percentage. I have been searching online but I cannot find any solution. I am wondering if I can like turn on something so the format_string will be evaluated.

Thanks Everyone!