Bueno, este es mi menu.lua, no he quitado ningun codigo, estan todos pero no se que pasa que da error:

System/menu.lua:50: '=' expected near 'e_

uso LuaPlayerHM8 y este es el codigo:

M1 = Image.load("img/menu1.png")
M2 = Image.load("img/menu2.png")
M3 = Image.load("img/menu3.png")
M4 = Image.load("img/menu4.png")
current=M1
while true do
pad = Controls.read()
screen:clear()
screen:blit(0,0,current)

if pad:right() and current==M1 then
current=M2
end

if pad:left() and current==M2 then
current=M1
end

if pad:right() and current==M2 then
current=M3
end

if pad:left() and current==M3 then
current=M2
end

if pad:right() and current==M3 then
current=M4
end

if pad:left() and current==M4 then
current=M3
end

if pad:cross() and current==M1 then
dofile("files/juegos.lua")
end

if pad:cross() and currern==M2 then
dofile("files/apps.lua")
end

if pad:cross() and currernt==M3 then
dofile("files/creditos.lua")
end

if pad:cross() and current==M4 then
System.Quit
end

screen.waitVblankStart()
screen.flip()
end

¿¿Qué hago mal en mi menú??