I have a problem with wall climbing. Everyone in my pk crew can use their momentum to get up the wall really quickly, but I always seem to have to muscle it up. I do put a foot on the wall to boost me up, but i dont know about my arms. What do I do?

This looks like a similar problem to your post about the tic tac.  Make sure you are pushing into the wall, downward at about 45 degrees in order to get the most push off of it with your foot.  As for muscling up, try to take the momentum from your step and translate it as fluidly as possible into pulling yourself up or over the wall.  There may be a lot of upper body strength required, but keep practicing and it will come to you.

One thing to remember is to focus on the top of the wall rather then foot placement. As long as you jump at the right point, your foot should automatically go where it needs to go.

It's a technique that I learned is not only affective in PK, but in life itself. Keep your eyes focused on your goal rather then the obstacle in your path.

Try this:

http://www.youtube.com/watch?v=EfFgFkAs_Ns