Any idea why I can't move?

Height = 11.36
Char = script.Parent.Parent

b = Instance.new("BodyPosition")
b.Parent = Char.Character.Torso
b.Position = Vector3.new(0,Height,0)
-- imagine jumping in a pool and coming back up.Now imagine after that you can't move... at all. Thats exactly what this script does any idea what I did wrong or what I'm not doing right?

Well I know as a fact that MaxPower is not valid, and doesn't exist, I believe you mean MaxForce which uses Vector3 to define it's value.

Char = script.Parent

b = Instance.new("BodyPosition")
b.Parent = Char.Torso
b.Position = Vector3.new(0,15.41,0)
b.MaxForce = Vector3.new(2300)

Edited Section

Char = script.Parent.Parent

b = Instance.new("BodyPosition")
b.Parent = Char.Character.Torso
b.Position = Vector3.new(0,11.36,0)

b.MaxForce = Vector3.new(0,2300,0)