CS3: printJob, multiple pages, dynamic textbox

[Julezz]

I can see many are asking about the the printJob but I can't really find an answer for my problem...
I use this code:

printBut.onRelease = function() {
    var pageCount:Number = 0;
    var my_pj:PrintJob = new PrintJob();
    if (my_pj.start()) {
        if (my_pj.addPage("txtMc", {xMin:0, xMax:600, yMin:0, yMax:800}, {printAsBitmap:false}, 2)) {
            pageCount++;
        }
    }
    // If addPage() was successful at least once, print the spooled pages. 
    if (pageCount>0) {
        my_pj.send();
    }
    delete my_pj;

}; 

Inside "txtMc" (frame 2) is a dynamic textbox and it's content depends on the user. It prints fine but only one page no matter what.
Can anyone please tell me what I'm doing wrong???

Thz