Problem with TellTarget

Hi:

Ive read this tutorial: http://www.kirupa.com/developer/flash5/advroll.htm

My buttons are located in this file: menu.swf . Works great.

But If I load this .swf in another swf it shows me the next messages when Im over a button:

Target not found: Target="/rollover" Base="_level0.menu.instance1"

Any ideas ?

Thanks