Launching centered htm windows..locally

I have not been able to get this to work locally. It works fine and dandy online… any solutions? Thanks!

on (release) {
// customize the window that gets opened
// 0 equals NO.
// 1 equals YES.
address = “\Images\poster.htm”;
target_winName = “”;
width = 629;
height = 648;
toolbar = 0;
location = 0;
directories = 0;
status = 0;
menubar = 0;
scrollbars = 0;
resizable = 0;
// sends data back to the function
openWinCentre(address, target_winName, width, height, toolbar, location, directories, status, menubar, scrollbars, resizable);
}