Barrita de Vida en boss

[Hukaeshi]

Hola quisiera crear un dxDrawRectangle donde me muestre cuanta vida tiene mi boss, pero el problema es que lo pongo y no me funsiona, es decir me sale es una barrita en negro pero no me muestra la vida que tiene, gra

local screenW, screenH = guiGetScreenSize()
local drawFontBoss = dxCreateFont("bossi.ttf", 10)
local maxDist = 50


    function witchNameTagNemesis()
    local bosses = getElementsByType ( "ped",getRootElement(),true )
    local Px,Py,Pz = getCameraMatrix( )
        for theKey,nemesis2 in ipairs(bosses) do
            if ( isElement( nemesis2 ) ) then
            local Zx,Zy,Zz = getElementPosition( nemesis2 )
            local zhx,zhy,zhz = getPedBonePosition( nemesis2,6 )
                if (getDistanceBetweenPoints3D( Px, Py, Pz, Zx, Zy, Zz ) < maxDist ) then
                    if ( getElementData (nemesis2, "NameTagP") == true) then
                        local sxx,syy = getScreenFromWorldPosition(zhx,zhy,zhz+0.3)
                        local currentDistance = getDistanceBetweenPoints3D(Px, Py, Pz, Zx, Zy, Zz)
                        local zombieHealth = getElementHealth(nemesis2)
                        local maxHP = exports.extra_health:getElementExtraHealth(nemesis2)
                        local currentHealth = getElementData(nemesis2, "currenthealth")
                        if sxx and getElementHealth(nemesis2) > 0 then
                        sx,sy = sxx-60,syy-10
                         dxDrawRectangle(sx-50,sy-18,260.0,25.0,tocolor(0,0,0,100),false) -- bg health
                        dxDrawText("Boss NmesiS",sx+7,sy-50,596.0,236.0,tocolor(255,0,0,255),0.80,"bankgothic","left","top",false,false,false)
						dxDrawText("Boss Health : "..math.floor(maxHP),sx-50,sy-18,200.0,25.0,tocolor(0,255,0,255),0.80, "bankgothic","left","top",false,false,false)
						dxDrawRectangle(sx+5,sy+25,131.0/maxHP,12.0,tocolor(255,0,0,200),false) -- health
					dxDrawRectangle(sx,sy,146.0,46.0,tocolor(0,0,0,0),false) --  background
					dxDrawRectangle(sx+5,sy+25,131.0,12.0,tocolor(0,0,0,100),false) -- bg health
                        end
                    end
                end
            end
        end
    end
    addEventHandler( "onClientRender", root, witchNameTagNemesis )
	
  

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