Unable to personlize dynamic text properties

Hello people,

I am very new to the forum and to Actionscript. I am stuck here with a problem and since 2 days i cannot resolve, i really don’t know why.

So i have a really nice flash gallery that i downloaded from a site but i am trying to personlize it. It uses a dynamic text (for the preloaders and the titles) which is post by this procedure :

fullPreloader.onLoadStart = function(target) {
target.createTextField(“my_txt”,fullImage_mc.getNextHighestDepth(),50,50,200,20);
target.my_txt.selectable = false;
};

So what i did was basically to create a new style (my_fmt) and apply it to dynamic style applied by default (my_txt) :

fullPreloader.onLoadStart = function(target) {
target.createTextField(“my_txt”,fullImage_mc.getNextHighestDepth(),0,0,200,20);
target.my_txt.selectable = false;

    var my_fmt:TextFormat = new TextFormat();
    my_fmt.font = "Swis721 BlkEx BT";
                
    target.my_txt.setTextFormat(my_fmt);

Anway nothing changes. The text is always the same (Times New Roman which is by default) I also tried to change de height and width definitions but no difference. It only works when i change the x and y position of the text.

Any help is appreciated. Thanks

I attach you the original .fla file in case you need (CS3 file)