Action Script Button Function Help

I'm having problems with the following script I'm using for an XML photo gallery.

for (i=0; i<49; i++) {
if (category[i] == "online") {
if (b<50) {
thumbbutton = this["a"+(b+1)];
thumbbutton.loadMovie(thumb[i], 1);
button = this["bt"+(i+1)];
button.onRollOver = function() {
company_txt.text = company[i];
description_txt.text = description[i];
url_txt.text = url[i];

};
}
b++;
}
}

The "i" variable works fine until it gets to the button.onRollOver function. I did a trace and "i" is always 49. It should never be 49 because the For loop should break at 49. Any suggestions as to why this is happening? I did a trace before the function, and I got 3 and 5 - there is the "online" tag at this position in the XML. Thanks!

add events outside of the for(loop)
loops only update on the last iteration (hence all are 49)

PHP Code:

---

for (var i=0; i<49; i++) {
if (category[i] == "online") {
if (b<50) {
thumbbutton = this["a"+(b+1)];
thumbbutton.loadMovie(thumb[i], 1);
button = this["bt"+(i+1)];
addEvents(button, i);
}
b++;
}
}

function addEvents(btn,id){
btn.onRollOver = function() {
company_txt.text = company[id];
description_txt.text = description[id];
url_txt.text = url[id];
};
}; 


---

hth :)