Velocity working on npcs and not on players?

Hi, this is a really simple script I made to test velocity on players.

It works perfectly fine in test mode on my player and on NPCs but when I try it in an actual game it doesn't work.

Any help is appreciated.

script.Parent.Touched:Connect(function(h)
    h.Velocity = h.Velocity + CFrame.new(h.Position,script.Parent.Position).lookVector * -1000
end)