Cache buster button code question (CS4/AS2)???

Question

I have a  button that loads guestbook.swf. As guestbook would be updated by me I would like the latest non cached version of guestbook.swf to load always.
This is the current working code on the button-
[QUOTE]on (release) {
//load Movie Behavior
if(this.L == Number(this.frame)){
loadMovieNum("guestbook.swf",this.frame);
} else {
this.frame.loadMovie("guestbook.swf");
//End Behavior
}[/QUOTE]
I would like to do what this guy suggested-
[QUOTE=lewi-p;2581359]Using a random variable will work but it's not exactly efficient. If you  generate a random number everytime someone requests your SWF, your  server will be sending a brand new version every single time...your  bandwidth could potentially go through the roof!
I would suggest using a date & time based cache buster string...so  adding "movingly.swf?cache=20101028" (todays date). So in this case  everyone will get the same file that day.
lewi-p[/QUOTE]
I added his code like this to the button-
[QUOTE]on (release) {
//load Movie Behavior
if(this.L == Number(this.frame)){
loadMovieNum("guestbook.swf?cache=20101028" (todays date)",this.frame);
} else {
this.frame.loadMovie("guestbook.swf?cache=20101028" (todays date)");
//End Behavior
}[/QUOTE]
Well the button stopped working when I added that. How should the code look for it to work? Thanks

Answer 1

EDIT- It seems to be working when viewed in a browser, I was testing it as a plain swf  before. Does that make any sense? Will test more and check on the server and report back
I tried you code and it won't load the guestbook.swf. In the Output window I get- Error opening URL.........guestbook.swf?cache=undefined'
I made a test file and the working button without time/date stamp has this code and it loads the guestbook.swf-
on (release) {
    //load Movie Behavior
    if(this.frame == Number(this.frame)){
        loadMovieNum("guestbook.swf",this.frame);
    } else {
        this.frame.loadMovie("guestbook.swf");
    //End Behavior
I have tried the following two versions of code with the time/date code and guestbook.swf does not load.
on (release) {
//load Movie Behavior
if(this.L == Number(this.frame)){
var d:Date=new Date();
loadMovieNum("guestbook.swf?cache="+d.getTime(),Number(this.frame));
} else {
this.frame.loadMovie("guestbook.swf?cache="+d.getTime());
//End Behavior
on (release) {
    //load Movie Behavior
    if(this.frame == Number(this.frame)){
        var d:Date=new Date();
        loadMovieNum("guestbook.swf?cache="+d.getTime(),Number(this.frame));
    } else {
        this.frame.loadMovie("guestbook.swf?cache="+d.getTime());
    //End Behavior