Cannot make call from one php file to another php file
===

I've 3 files.
fileNum1
fileNum2
fileNum3

fileNum1 file makes a call for fileNum2 file

		if (window.XMLHttpRequest)
		{
			// code for IE7+, Firefox, Chrome, Opera, Safari 
			xmlhttp=new XMLHttpRequest();
		}
		else
		{
			// code for IE6, IE5 
			xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
		}
		xmlhttp.open("GET","fileNum2.php",false);
		xmlhttp.send();	

and fileNum2 makes a call for fileNum3:

		if (window.XMLHttpRequest)
		{
			// code for IE7+, Firefox, Chrome, Opera, Safari 
			xmlhttp=new XMLHttpRequest();
		}
		else
		{
			// code for IE6, IE5 
			xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
		}
		xmlhttp.open("GET","fileNum3.php",false);
		xmlhttp.send();	


the call to fileNum3 is NOT WORKING!
What is the the problem?
(can it be because I've started new XMLHttpRequest inside existing XMLHttpRequest?)
Thnks!
