actionscript 3 - flash as3 external swf help/error -

I am having trouble loading external SWFs in my SS3 project. I have created both swfs and both were using AS3 in a file I am trying to load other SBFs, it works just for testing purposes but for some reasons I am getting this error: < / P>

  TypeError: Error # 1009: Can not access the property or method of an empty object reference.  

It works fine until this error is thrown, and then it starts messing around, no idea what will be the reason. Is there something that I'm missing or something that I have to do to properly load? Any help is appreciated.

Edit:

I thought this information could also be useful. In the error also it says:

at at flash.events::EventDispatcher/dispatchEventFunction () in flash.events::EventDispatcher/dispatchEvent () at flash.utils :: timer / tick ()

It is difficult to say whether there is a zero point error - mostly like this In cases (due to the loading of the SWF 1009), the load of the loaded SWF is due to reach - stage to stage - unless you have the object displayed in the display list Do not add to

He did not post it; It's missing at least one row, and that's the key line - it tells the location of the error in your code, post any timer handling code in the loaded SWF and we may be able to point to the origin of the error Are there.