my friend still has that exact problem... i don't know what you exactly do because i haven't seen you wallrun.... but i know that the biggest problem my friend has is that he tries to shift his hips to run along the wall while his torso is still parallel to the wall... that won't work at all... i can get four solid steps, sometimes five if i am on a really good surface... what i do is i run at a 45 degree angle towards the wall and when you're jumping onto the wall to start to run, tilt your body away from the wall probably at like 30 to 45 degrees away from the wall... this should make it so you don't slide down... also, try not to think of it as jumping up and running along the side of the wall... its almost as if you're jumping into it at the beginning... that's why you approach from a 45 degree angle... hope that helps!!!
