Using the filebrowser outside the editor in Firefox/Opera

Hi, i have the following problem:

I use the pick.js to let the user select an image through the filebrowser and put its path into an input box. Everything works quite well in IE, but not in Firefox or Opera. There the filebrowser opens, but when i select a file nothing happens. When I use the filebrowser into the editor (through insert image) everything works, even in Firefox and Opera. Has someone an idea what it could be? I need to say, that i had to change the pick.js a little bit:

function BrowseServer(obj)
{
   urlobj = obj;
   
   OpenServerBrowser(
      'fckeditor/editor/filemanager/browser/default/browser.html?Type=Image&Connector=../../connectors/php/connector.php',
      screen.width * 0.7,
      screen.height * 0.7 ) ;
}

If i only set the connector to connectors/php/connector.php then i get a bad xml response error. Don't know if that could be the problem, but ie takes it...

Greetings Felix