Passing Variables to SWF Breaks File Naming.......

I am modifying an existing swf, and I am trying to pass in some variables by adding them to the query string of the swf when I embed. All of that works fine, at the start of my .fla I added in:
_root.authorid;
_root.listid;
_root.itemid;
_root.commentid;

and I can access all of those no problem, but when I add these in it breaks the file naming. This app saves video recording to a flash media server. Here is the section that does the naming of the file on the server:
Once I add the above in, the _root.filename; comes back as undefined.

(The Name part is _root.id = _root.filename;)

this.rec_btn.onRelease = function() {
      //getURL("javascript:recordClicked()");      
      replay_btn.enabled = false;
      help_mc._x = -200;
      if (media == 1) {
            if (bMic == false) {
                  info_mc.info_txt.text = _global.NOMIC;
                  info_mc._y = 50;
            } else {
                  //_root.id = "audio_"+String(new Date().getTime());
                  _root.id = _root.filename;
                  _root.rec_btn._visible = false;
                  _root.recStop_btn._visible = true;
                  _root.rec_btn.enabled = false;
                  _root.recStop_btn.enabled = true;
                  _root.radioAudio.enabled = false;
                  _root.radioVideo.enabled = false;
                  _root.outStream.close();
                  _root.inStream.close();
                  _root.doWhat = "record";
                  connect();
            }
      }

Does anyone see what I'm doing wrong? Or if I am maybe compiling it wrong or somethign? My flash skills are super limited at best.

Thanks!
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