Error 1010 undefined property

Question

really i should know why this is happening but my brain is is frozen!
here it my code:
stop();
addEventListener(Event.ENTER_FRAME, loaderF);
function loaderF(e:Event):void{
var toLoad:Number = loaderInfo.bytesTotal;
var loaded:Number = loaderInfo.bytesLoaded;
var total:Number = loaded/toLoad;
if(loaded == toLoad) {
  removeEventListener(Event.ENTER_FRAME, loaderF);
  gotoAndStop(2);
} else {
  preloader_mc.preloaderFill_mc.scaleX = total;
  preloader_mc.percent_txt.text = Math.floor(total*100) + "%";
  preloader_mc.ofBytes_txt.text = loaded + "bytes";
  preloader_mc.totalBytes_txt.text = toLoad + "bytes";

Answer 1

Is that the entire error message you get after you have selected the Permit Debugging option?  As is, it is telling you there is something in that function that is out of scope in some way (doesn't exist where that code executes, misnamed, etc).  I would have expected more info in the error message with the permit debugging enabled.
Here's another tip, actually more than a tip, it's how to troubleshoot your code when things aren't working...  Use trace() commands to see what values things have and/or how far processing goes before things stop working.  In this case you are getting indications that something doesn't exist in the eyes of your code, so you need to trace each object to see what's coming up as undefined...
addEventListener(Event.ENTER_FRAME, loaderF);
function loaderF(e:Event):void{
trace(loaderInfo.bytesTotal); // see if infoLoader exists
var toLoad:Number = loaderInfo.bytesTotal;
var loaded:Number = loaderInfo.bytesLoaded;
var total:Number = loaded/toLoad;
if(loaded == toLoad) {
  removeEventListener(Event.ENTER_FRAME, loaderF);
  gotoAndStop(2);
} else {
     trace(preloader_mc); // then trace each object you assign values to
  preloader_mc.preloaderFill_mc.scaleX = total;
  preloader_mc.percent_txt.text = Math.floor(total*100) + "%";
  preloader_mc.ofBytes_txt.text = loaded + "bytes";
  preloader_mc.totalBytes_txt.text = toLoad + "bytes";