Start Webfm with the main tree expanded

Hi
Thanks for a very useful module
I would like to have wefm file tree expanded on load. I had a look at webfm.js and found this part of the code
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Webfm.tree = function(parent, treeIdx, root_menu, dir_menu) {
var wt = this;
this.id = 'dirtree' + treeIdx;
this.treeIdx = treeIdx;
this.icondir = getWebfmIconDir();
this.content = '';
this.expAllData = [['collapse', 'minus', 'block'], ['expand', 'plus', 'none']];
// Set tree exp/collapse behaviour on load (0 = expanded, 1 = collapsed)
this.expAllIndex = 1;
this.root_menu = root_menu;
this.dir_menu = dir_menu;
this.eventListeners = []
-----------------------------------------------------
I changed the expAllIndex = 0 but this did not work for me. Of course I could be doing the wrong thing in the wrong place. I would appreciate some assistance on this.
Thanks
Bruce Andersen
Using Firefox 3.5.7 if that makes any difference and the site is on a Windows server.