Why my Federal refund is not increasing when I entered more deduction (mortgage + property tax)?

I have about $6k mortgage and $5k property tax, but my federal tax refund remains the same as I only entered $6k mortgage first.  It seems that $5k property tax is not considered?? 

(sorry I forgot to mention, that I used itemised deduction, that also allows for higher amount to be deducted, right?!)