Problem Processing JavaScript Function

I have a desktop software product (Rmsad.exe) that runs as a process in the background. Periodically, Rmsad.exe makes a call to a .php page (smfeed.php) on my server. One of the parameters it sends over is an URL to load in a DHTML window. Inside smfeed.php, I call a javascript function that displays the DHTML window:

var googlewin=dhtmlwindow.open("googlebox", "iframe", '<?php echo $outurl2; ?>', "Title text here",
"width=<?php echo $winwd; ?>px,height=<?php echo $winht; ?>px,resize=1,scrolling=1,center=1", "recal")

Code (markup):

This is a replacement for calling a basic javascript pop-up window. The script is a slightly expanded version of the one here:

http://www.dynamicdrive.com/dynamicindex8/dhtmlwindow/index.htm

Here's the layout of the smfeed.php page:

<?php
//Php code that exist here gets properly executed
//
//
?>

<script type="text/javascript" src="deluxe-popup-window.js"></script>
<script type="text/javascript">
var googlewin=dhtmlwindow.open("googlebox", "iframe", '<?php echo $outurl2; ?>', "Title text here", "width=<?php echo $winwd; ?>px,height=<?php echo $winht; ?>px,resize=1,scrolling=1,center=1", "recal")
</script>

<?php
//Php code that exist here gets properly executed
//
//
?>

Code (markup):

If you call the smfeed.php page directly, by manually entering it's URL into a browser address bar, the DHTML window script (dhtmlwindow.open) works fine. The DHTML window gets displayed. However, when smfeed.php is called from msad.exe, the window doesn't load at all. I tried replacing the dhtmlwindow.open statement with a very basic:

<script type="text/javascript">
window.open ('http://www.bing.com')
</script>

Code (markup):

statement, just to test with a less complex javascript. It wouldn't load a window either. Again, both work if calling smfeed.php directly. There is php code before and after the javascript DHTML call. All the php code gets executed properly. So I know the entire smfeed.php page is getting processed.

Any ideas why the javascript functions won't work when contacted by Rmsad.exe?

 

Popup blocker?

 

I agree.
dhtmlwindow.open() from dynamic-drive is either a <div> or <iframe>, not a stand-alone window.