Thanks Guys it Worked Now 
But i have some questions
When i try playing in practice mode i win a lot..knowing that's it's provably fair when i play for real with some bitcoins even with only three mines i catch a mine at 2nd aur 3rd attempt most of the time so what is it guys some kind of cheating? it doesnt really matter i guess because it is provably fair, although iam not an expert in provably fair thing even when you are playing as practice, consider this a badluck and try again, PS : some tips, try with a 1 mines