How can I convince my mom to let me go to my friends house?

Ok so I used to go to my friends house every day ( lets call her Ashley). Ashley ives basically behind me maybe 5 or 6 houses back. My mom used to let me go over there almost every day. Now al of a sudden when I ask her to go over there before I even finish the questions the answer is NO! I did nothing wrong over there and have to go over there to get to church. I couldnt even go to church today because of that! How can I convince her to let me start going over there again. Every time I went over there before i gave my mom the address and numbers of where I would be and where I was going> WHATS MY MOMS ISSUE!?!?!?!