Flash links in firefox

hey, can somebody help me out! i have a flash movie and in it buttons that link to local files, like jpg’s and stuff. I use this code in the frame:

button.onRelease = function(){
getURL(“picture.jpg”, “_blank”)
}

which works fine in IE but doesn’t in firefox… In firefox it opens a new window and then loads www.bloomberg.com of all things!!! why the hell does this happen? very frustrating!

anybody got an answer??