I need to move this object forward on the objects local vector, but my script doesn't work, Fix?

Code is right here.

script.Parent.MouseClick:Connect(function()

	script.Parent.Parent.Parent.MainPlank.Velocity = script.Parent.Parent.Parent.MainPlank.Velocity + CFrame.new(Vector3.new(25,0,0))
end)

I get this error: 02:53:36.661 - Workspace.Boat.Forward.ClickDetector.Forward:7: invalid argument #2 (Vector3 expected, got CFrame)