Dynamic Button/GetURL problem

Hello. I’m working in Flash 9, AS2.

I have a button that (should) open a new window whose URL is determined by a variable, downloadlink:

on(press) {
downloadlink = _root.download[songnumber];
_root.getURL(downloadlink, “_blank”);

• I’ve traced this, and the variable for downloadlink is working correctly, pulling in a full URL like “http://www.kirupa.com” from an array in the root

• this does not seem to be a popup block issue - because when I replace the code with:
downloadlink = “http://www.kirupa.com”;
… the new page opens with no problem, in a new window

Can someone solve this for me? Is it a parsing issue? Help would be appreciated - thanks,