Passing variables with querystring (w/ 2 swf)

programming flash
1

So, I have this old project where I have to pass a querystring from one flash to another…

mc.onPress = function() {
whatURL = “index.html?id=”+this.id+"&num="+this.num
getURL(whatURL, “_blank”, “GET”);
}

But when pressed, i get a querystring longer than my arm :
http://www.myurl.com/index.html?id=0&num=37&&activateList=[type+Function]&createList=[type+Function]&slider=[type+Function]&listed=0 and a whole lot of other variables and functions… i end up getting a Request-URI too large.
How come I pass all these different variables to the query string when I just ask for 2??

Thanks a lot!