problems getting text string from assetbundle

I'm trying to get a text file from an assetbundle and put it in a string variable. I am successfully able to load the assetbundle and take a texture from the bundle and apply it to an object, but something is wrong with my code for grabbing a txt file hat1_info.txt and trying to put it into a TextAsset. I don't get any errors except the textasset is null.

 downloadAssetBundle();
 
 function downloadAssetBundle(){
 var urlEditor = "file:///Users/dan/Desktop/hat1bundle.unity3d";
 var hat:GameObject;
 var bundle:AssetBundle;
 // Start a download of the given URL
 if (Application.platform == RuntimePlatform.OSXEditor){
 var www:WWW = WWW.LoadFromCacheOrDownload (urlEditor, 1);
 yield www;
 bundle = www.assetBundle;
 makeitso(bundle);
 }
 }
       
 function makeitso(bundle:AssetBundle){
 Debug.Log("making it so");
         
 //this works      GameObject.Find("Sphere").renderer.material.mainTexture=bundle.Load("hat1_texture",Texture);   
 //this does not work gives back null
 var txt:TextAsset = bundle.Load("hat1_info", typeof(TextAsset)) as TextAsset;
 
 Debug.Log(txt); //gives back null
 Debug.Log(txt.text);
 var s=txt.text;
 Debug.Log(s);
 }