How is the ancestral property divided if there is a registered will

My grandfather made a registered will in 2009 and he passed away in 2013.He left the house to my father and his money to be equally divided among his children who are 6 daughters and 1 son (My father). Now his daughters are not letting us probate/execute the will by refusing to present their sign on agreeing for the same.My father has 2 sons me and my brother.What will happen if something happens to my father?? will the ancestral house be transferred to my mother's name automatically, do we brothers would have a share of property.And moreover my grandfather made the house by his own earnings.