F4 Duty sytem bugged

[LuisPark]

Hi guys , like i edited spl4z gamemode , it's was a good mode but have someproblem with this

when i try /duty sytem , it's tell me to press f4 but when i press f4 nothing happend to me , the server.exe didnt say any error

here is my code : Please help me

local odimension, ointerior, ox, oy, oz, orot, oskin 
local localPlayer = getLocalPlayer() 
local team = 0 
local factionrank 
local skins 
local skincount 
local curr 
  
function changeDutySkin() 
    local factionid = getElementData(localPlayer, "faction") 
    factionrank = getElementData(localPlayer, "factionrank") 
    curr = 1 
  
    if (factionid==1) then 
        team = 1 
        skins = { } 
         
        skins[1] = { } 
        skins[1][1] = 71 
        skins[1][2] = 1 
         
        skins[2] = { } 
        skins[2][1] = 280 
        skins[2][2] = 2 
         
        skins[3] = { } 
        skins[3][1] = 281 
        skins[3][2] = 10 
         
        skins[4] = { } 
        skins[4][1] = 282 
        skins[4][2] = 12 
         
        skins[5] = { } 
        skins[5][1] = 283 
        skins[5][2] = 15 
         
        skins[6] = { } 
        skins[6][1] = 284 
        skins[6][2] = 2 
         
        skins[7] = { } 
        skins[7][1] = 288 
        skins[7][2] = 13 
        skincount = 7 
    elseif (factionid==2) then 
        team = 2 
        skins = { } 
         
        skins[1] = { } 
        skins[1][1] = 274 
        skins[1][2] = 1 
         
        skins[2] = { } 
        skins[2][1] = 275 
        skins[2][2] = 1 
         
        skins[3] = { } 
        skins[3][1] = 276 
        skins[3][2] = 1 
         
        skins[4] = { } 
        skins[4][1] = 277 
        skins[4][2] = 1 
         
        skins[5] = { } 
        skins[5][1] = 278 
        skins[5][2] = 1 
         
        skins[6] = { } 
        skins[6][1] = 279 
        skins[6][2] = 1 
        skincount = 6 
    elseif (factionid==4) then 
        team = 4 
        skins = { } 
         
        skins[1] = { } 
        skins[1][1] = 163 
        skins[1][2] = 1 
         
        skins[2] = { } 
        skins[2][1] = 164 
        skins[2][2] = 1 
         
        skins[3] = { } 
        skins[3][1] = 165 
        skins[3][2] = 1 
         
        skins[4] = { } 
        skins[4][1] = 166 
        skins[4][2] = 1 
         
        skins[5] = { } 
        skins[5][1] = 286 
        skins[5][2] = 1 
         
        skincount = 5 
    else 
        return 
    end 
     
    odimension = getElementDimension(localPlayer) 
    ointerior = getElementInterior(localPlayer) 
    ox, oy, oz = getElementPosition(localPlayer) 
    orot = getPedRotation(localPlayer) 
    oskin = getElementModel(localPlayer) 
     
    local dimension = 65000 + getElementData(localPlayer, "gameaccountid") 
    setElementDimension(localPlayer, dimension) 
    setElementInterior(localPlayer, 0) 
    setElementPosition(localPlayer, 2373.1181640625, 972.830078125, 18.318904876709) 
    setPedRotation(localPlayer, 0) 
     
    setCameraMatrix(2373.0029296875, 976.880859375, 18.318904876709, 2373.1181640625, 972.830078125, 18.318904876709) 
    bindKey("Enter", "down", finishDutySkin) 
    addEventHandler("onClientRender", getRootElement(), displayHelpText) 
     
    unbindKey("F4", "down", changeDutySkin) 
    bindKey("arrow_l", "down", prevDutySkin) 
    bindKey("arrow_r", "down", nextDutySkin) 
     
    setElementModel(localPlayer, skins[1][1]) 
     
    toggleAllControls(false, true, false) 
end 
bindKey("F4", "down", changeDutySkin) 
  
function prevDutySkin() 
    curr = curr - 1 
    if (curr<1) then 
        curr = skincount 
    end 
     
    setElementModel(localPlayer, skins[curr][1]) 
end 
  
function nextDutySkin() 
    curr = curr + 1 
    if (curr>skincount) then 
        curr = 1 
    end 
     
    setElementModel(localPlayer, skins[curr][1]) 
end 
  
function displayHelpText() 
    local screenWidth, screenHeight = guiGetScreenSize() 
    dxDrawText("Use arrow keys to pick a skin. Enter to select that skin.", screenHeight-380, screenHeight-93, screenWidth-30, screenHeight, tocolor ( 255, 255, 255, 255 ), 1, "pricedown") 
     
    if (skins[curr][2]>factionrank) then 
        dxDrawText("You are not a high enough rank to use this skin.", screenHeight-380, screenHeight-120, screenWidth-30, screenHeight, tocolor ( 255, 0, 0, 255 ), 1, "pricedown") 
    end 
end 
  
function finishDutySkin() 
    if (skins[curr][2]>factionrank) then 
        playSoundFrontEnd(7) 
    else 
        toggleAllControls(true, true, false) 
        bindKey("F4", "down", changeDutySkin) 
        unbindKey("arrow_l", "down", prevDutySkin) 
        unbindKey("arrow_r", "down", nextDutySkin) 
        removeEventHandler("onClientRender", getRootElement(), displayHelpText) 
        setElementDimension(localPlayer, odimension) 
        setElementInterior(localPlayer, ointerior) 
        triggerServerEvent("finishDutySkin", localPlayer, ox, oy, oz, orot, odimension, ointerior, skins[curr][1]) 
        setElementModel(localPlayer, oskin) 
        unbindKey("Enter", "down", finishDutySkin) 
    end 
end