How to jump through a platform and land on top with gamesalad

Here is a link to the project file DOWNLOAD

The MATH

self.Position.X -( self.Size.Width /2)-( game.playerswidth /2)
self.Position.X +( self.Size.Width /2)+( game.playerswidth /2)
self.Position.Y +( self.Size.Height /2)+( game.PlayersHight /2)

cheers