Loading movieclips from Library:HELP!

Ok here’s my question: Trying to use Kirupa’s tutorial for transitions, but instead of loading external .swf’s, I’m trying to load movieclips located in my library. All movieclips have been given proper linkage identifiers and am trying to load into a path such as this:

_root.folioClip.viewerClip

Basically I’m loading into an empty movieclip that’ nested inside another movieclip that’s sitting on the main stage. The code that I’m using to trigger my buttons is:

on (release)  { 
if  (_root.currMovie  ==  undefined)  { 
_root.currMovie  =  "ONE_mc";
_root.folioClip.viewerClip.attachMovie("ONE_mc");
}  else if  (_root.currMovie  !=  "ONE_mc")  { 
if  (_root.folioClip.viewerClip._currentframe  >=  _root.folioClip.viewerClip.midframe)  { 
_root.currMovie  =  "ONE_mc";
_root.folioClip.viewerClip.play();
}
}
}

And code that I’m using at the end of each movieclip is this:

_root.folioClip.viewerClip.attachMovie(_root.currMovie);

Problem is that when I test the movie anc click on the buttons, nothing happens. I thought that it might be a path problem, but I’m not sure. Can you not load movieclips from the library using the code found in Kirupa’s tutorial on Transitions? Can some please help? THANKS A MILLION!!!

P.S. that space in between the M and “ovie”, in that last code is not my doing. It jut keeps showing up in the forum like that. Thanks Again!!!