WampServer

I am running WampServer 2.0 installation went well on my Vista machine.

I am running code in which an html page calls a JavaScript page which in turn calls a PHP page, in essence Ajax.

The specific call in JavaScript is:

xHRObject.open("GET", "managecart.php?action=" + action + "&book=" + book + "&value=" + num, true)

//the xHRObject is a XMLHttpRequest object

when the call is made there is a graphic that is supposed to appear, with my version nothing happens.


In checking the code, the author claims all is well and wonders if my PHP is configured correctly for my web server?

Just wondering if either for vista of ajax there are any specific PHP settings that are necessary beyond mere installation?

Thanks