I got an error when writing telltarget

Hi Im very new to flash and trying to learn the ropes of actionscript.

I read Kirupa’s article on the telltarget command and have duplicated it in my own project i am working on. but when I click on the button contaion the tell target, I get an error which says:

Target not found: Target="/landmenu" Base="_level0"

Maybe one of you may know the answer to this.

Thanks Alex