Foot problems

Hey,
I just switched to a shortboard a 6'7 quad and i am having problems when i pop up. My feet are always to close together near the back and the board shoots in front of me. How do i fix this problem? thanks
I just switched to a shortboard a 6'7 quad and i am having problems when i pop up. My feet are always to close together near the back and the board shoots in front of me. How do i fix this problem? thanks