Problem with external flash variables

Hello,

I need some help to solve a problem with external variables.
I have a flash movie - index.swf.

_On the first frame of this movie I have a frame where I define my varibles:

presentation=“yes”;
clip1=“no”;
clip2=“yes”;
conclusion=“yes”;

_On the second frame I have this actionscript:

if (presentation == “sim”) {
loadMovieNum(“presentation.swf”, 1);
}
else {
gotoAndPlay(3);
}

_On frame 3 I have:

if (clip1 == “yes”) {
loadMovieNum(“clip1.swf”, 1);
}
else {
gotoAndPlay(4);
}

_On frame 4 I have:

if (clip2 == “yes”) {
loadMovieNum(“clip2.swf”, 1);
}
else {
gotoAndPlay(5);
}

_On frame 5:

if (conclusion == “yes”) {
loadMovieNum(“conclusion.swf”, 1);
}
else {
gotoAndPlay(2);
}

And this script is working. When I make a movie preview my movie loads the presentation.swf, clip2.swf and concluison.swf.

When I define my variables from a external TXT file the movie doesn´t work.

I creat a TXT called navigation.txt with the definition of my variables:

&presentation=yes&clip1=no&clip2=yes&conclusion=yes& and

On the first frame of flash I define the name of the external TXT file with the variables:

loadVariablesNum(“navigation.txt”, 0);

And the flash doesn´t work. Why?
Can you help me?

Thank you.
And I ask you sorry because my poor English