Help Controlling _visible with external data

Can someone out there help me out? I am pulling in text through a .txt file using LoadVars(). The part I need help with is I’m trying to control the visibility of a movie clip using the data in the text file.

Text file: &imgVis = off

Then that comes into Flash and into an if statement.

_global.vis = myData1.imgVis;
if (_global.vis == “off”){
_root.body_mc.one_mc._visible = false;
_root.body_mc.one_mc._visible = true;

That doesn’t seem to work for me. Doesn anyone know what I’m doing wrong or another solution?