How can I write that line properly?

Hi, please help me with the following:

Flash8, AS2

This code line works:
_root.movietag = movie.load(“http://www.mymoviesite/movies/moviecode.xml”);

Now, Id like to grab that URL code (http://www.mymoviesite/movies/) from the moviecode.xml file - which resides on my server, and is listed in my actionscript 2, under: movietag[4].firstChild.nodeValue - and then put it in front of the digicode.xml (see code above, which works).

This is what I tried in as2, but doesnt work, Im afraid, bad syntax:

_root.movietag = movie.load(“movietag[4].firstChild.nodeValue/”+“moviecode.xml”);

Please help me, thanks guys!!!