Url for txt file in dynamic text field?

Hi, I have a problem with a dynamic text field, which displays a txt file.

If I hardcode the file name in the code, then it works fine. This is on the first frame of my movie, which holds the dynamic text field.

Code:

---

myData = new LoadVars();
myData.onLoad = function(success)
{
        if (success)
        {
                mytxt.htmlText = this.txt;
        }
};

myData.load("test.txt);

stop();

---

But if I try to define the url of the text with a variable, and try to send it the url in the browser (.swf?txturl=http://www.myurl.com/), it doesn't work:

Code:

---

myData = new LoadVars();
myData.onLoad = function(success)
{
        if (success)
        {
                mytxt.htmlText = this.txt;
        }
};

link = _root.txturl + "test.txt";

myData.load(link);

stop();

---

Is there a trick to defining url's for dynamic text fields? Because if I hardcode the path from the server, it works locally, but again not on the server...

Any ideas? Thanks!

Nothing initially catch my eye as being wrong in code. Does it work if you hardcode the full path? ie

Code:

---

myData.load("http://www.myurl.com/test.txt");

---

what do you get when you trace out:

link = _root.txturl + "test.txt";