So, my plan is to make small thumbnails of URL's with PHP and IECapt.
IECapt works well, a nice command line tool, gets the full sized image of specified URL in 1 to 4 seconds.
But my problem is to execute it trough PHP. This is the code I've trying to get working: 

```
exec('IECapt.exe ' . escapeshellarg($URL) . ' ' . escapeshellarg($Filename))

```

$URL is of course the URL, and $filename is a simplified version of the URL. 

Sometimes I get the IECapt to snap the image(trough PHP), but it takes awfully long (30-60s), and in the end I always get a 500-error, with no error messages to tell me what's wrong.
Both variables are fine, they work manually with commandline:

 IECapt <http://google.com> Google.png

My server set-up is IIS7 and PHP5.2.9, if relevant. 
(Windows Vista, all on my personal computer, so full access.)

Any ideas?