Loading external text problem


I use the code below for a button and the same kind of code for another button to load Text in columns (veld1,veld2,veld3). I want to make a fade out before the new text shows, that is what I use the alpha tween for.

This works fine on my local server, but when I try it online, it works when I wait a while before I press one of the buttons, but it gets messy when I do it quickly. I have the feeling it has to do with text still being in cache or that it should be unloaded.

veldmaskTween = new mx.transitions.Tween(_parent.veldmaskMC, “_alpha”, mx.transitions.easing.Regular.easeOut, 0,100, .5, true)
veldmaskTween.onMotionFinished = function() {

loadText1 = new LoadVars();
loadText1.onLoad = function(success) {
if (success) {

_parent.veld1.html = true;
_parent.veld1.htmlText = this.content;
_parent.veld2.html = true;
_parent.veld2.htmlText = this.content;
loadText2 = new LoadVars();
loadText2.onLoad = function(success) {
if (success) {
_parent.veld3.html = true;
_parent.veld3.htmlText = this.veld3;
new mx.transitions.Tween(_parent.veldmaskMC, “_alpha”, mx.transitions.easing.Strong.easeOut,100, 0,3, true);

To make it more clear (maybe), it looks like this:

Could someone please help me?

Thank you very much,