Tengo un problema y no se como solucionarlo estoy programando un reproductor en Lua Player 0.20 y me sale un Error: Mp3me a nil value no se como solucionarlo, este es el codigo:

play = Image.load("img/play.png")

stop = Image.load("img/stop.png")

fondo = Image.load("img/reproducctor.png")

System.currentDirectory("ms0:/MUSIC")

oldpad = Controls.read()

playing = false

blanco = Color.new(255,255,255)

rojo = Color.new(255,0,0)

fbrowser = {s = 1, fl = System.listDirectory("ms0:/MUSIC"), ls = 1, sp = 22}

fbrowser.nf = table.getn(fbrowser.fl)

oldpad = Controls.read()

function printcentered(y,text,color,font)

if color == nil then

color = Color.new(255,255,255)

end

if not font then

screen:print(240-(string.len(text)/2)*8,y,text,color)

else

screen:fontPrint(font,240-3*string.len(text),y,text,color)

end

end

function img()

screen:blit(0,0,fondo)

if playing == true then screen:blit(40,230,stop); end

if playing == false then screen:blit(40,230,play); end

end

function pausa()

local oldpad2

local pad2

oldpad2 = Controls.read()

while true do

pad2 = Controls.read()

if oldpad2~=pad2 and tostring(pad2)~="Controls (0)" then

break

end

oldpad2 = pad2

end

end

function readfile(el_file)

el_file = string.sub((el_file),1,string.len(el_file)-4) .. ".txt"

fichero = io.open(el_file, "r")

if fichero~=nil then

for line in fichero:lines() do

screen:clear()

screen:blit(0,0,fondo)

printcentered(15,line,Color.new(255,255,255))

if playing == true then screen:blit(40,230,stop); end

screen.flip()

screen.waitVblankStart()

pausa()

end

fichero:close()

end

end

function runfbrowser()

for i = ((fbrowser.ls-1)*fbrowser.sp)+1,fbrowser.ls*fbrowser.sp do

if fbrowser.nf >= i then

screen:print(5,((i-((fbrowser.ls-1)*fbrowser.sp))*10)-10,fbrowser.fl[i].name,blanco)

elseif fbrowser.nf <i then break end

end

screen:print(5,((fbrowser.s-((fbrowser.ls-1)*fbrowser.sp))*10)-10,fbrowser.fl[fbrowser.s].name,rojo)

if pad:down() and not oldpad:down() then

fbrowser.s = fbrowser.s + 1

end

if pad:up() and not oldpad:up() then

fbrowser.s = fbrowser.s - 1

end

if fbrowser.s > fbrowser.nf then

fbrowser.s = fbrowser.nf elseif fbrowser.s < 1 then

fbrowser.s = 1

end

if fbrowser.s > fbrowser.sp*fbrowser.ls then fbrowser.ls = fbrowser.ls + 1

elseif fbrowser.s < ((fbrowser.ls-1) *fbrowser.sp)+1 then fbrowser.ls = fbrowser.ls - 1 fbrowser.s = (fbrowser.ls)*fbrowser.sp

end

if pad:cross() and not oldpad:cross() then

if fbrowser.fl[fbrowser.s].directory then

System.currentDirectory(fbrowser.fl[fbrowser.s].name)

fbrowser.s = 1

fbrowser.fl = System.listDirectory()

fbrowser.nf = table.getn(fbrowser.fl)

fbrowser.ls = 1

end

if not fbrowser.fl[fbrowser.s].directory then

if string.lower(string.sub(fbrowser.fl[fbrowser.s].name, -4)) == (".mp3" or ".MP3" ) then

if playing == true then

playing = false

end

if playing == false then

Mp3me.stop()

System.memclean()

Mp3me.load(fbrowser.fl[fbrowser.s].name)

Mp3me.play()

playing = true

readfile(fbrowser.fl[fbrowser.s].name)

end

end

end

end

if pad:circle() and not oldpad:circle() then

if playing == false then

playing = true

end

if playing == true then

Mp3me.stop()

System.memclean()

playing = false

end

end

if pad:square() and not oldpad:square() then

if playing == true then

Mp3me.pause()

end

end

if pad:triangle() and not oldpad:triangle() then

if System.currentDirectory ~= "ms0:/MUSIC" then

System.currentDirectory("ms0:/MUSIC")

fbrowser.s = 1

fbrowser.fl = System.listDirectory()

fbrowser.nf = table.getn(fbrowser.fl)

fbrowser.ls = 1

end

end

end

while true do

pad = Controls.read()

screen:clear()

img()

runfbrowser()

if pad:l() and pad:r() then 

Mp3me.stop()

System.memclean()

collectgarbage()

dofile("ms0:/PSP/GAME/Luaplayer/script.lua"); end

screen.waitVblankStart()

screen.flip()

oldpad = pad

if pad:start() then

break

end

end