what do you mean defined?

I will paste my code so you have better understanding.  Here is what i have in my flash:

txt1.text = logos;

It seems I have difficulties passing the FlashVars from html.  I have created a dynamic text box which I gave the instance name txt1.  In my html, I have the following code for the flash:

<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" width="300" height="60" id="FlashID" title="logoflash">

     <param name="movie" value="logo.swf" />

     <param name=FlashVars value="logos=usb%2mp3" />

     <param name="quality" value="high" />

     <param name="wmode" value="opaque" />

     <param name="swfversion" value="6.0.65.0" />

     <!-- Next object tag is for non-IE browsers. So hide it from IE using IECC. -->

     <!--[if !IE]>-->

     <object type="application/x-shockwave-flash" data="logo.swf" width="300" height="60">

          <!--<![endif]-->

          <param name=FlashVars value="logos=usb%2mp3" />

          <param name="quality" value="high" />

          <param name="wmode" value="opaque" />

          <param name="swfversion" value="6.0.65.0" />

          <param name="expressinstall" value="Scripts/expressInstall.swf" />

     </object>

</object>

I have already wrote "fla" in the text box.  When I preview the flash only all that shows is "f".  When I preview the html within Dreamweaver, there is nothing on the text box.

When i try your code:

trace(usb);

var mc:MovieClip=_root.attachMovie(usb, usb,1);

trace(mc);

Nothing shows...I have worked with that 4 hours yesterday and read everything, I`m lost!!!

...of course i get undefined i run the flash without the html...

I have found the way to show the symbols, my problems was they showed completely off the bounds of scene...

My problem now is the FlashVars