American Parkour

when i wall run i can only get one foot on the wall if i hit the wall with my right foot my hands go a few inches above the wall before landing and if i hit with my left i hang in the air for a fraction of a second gaining a few inches but mostly just hovering long enough to grab the top im gonna move to a higher wall soon and want to know how to get the second foot on the wall for extra height? i cant get a second step into my tic-tac either