How can i stop sleep walking?

for some reson i cant stop sleep walking.i sleep walk every nigt and i aways wake up in a diferent part of the house.like this morning i woke up on my pool table and yesterday morning i woke up on the couch and acouple days ago i woke up on top of my dady.i had no idea how hapend arigt.i try duck taping my door but i stil got it open.how do i stop sleep walkin???plece help