Description:
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Use IIS 6 with an ISAPI module and exec and system will never actually call the application to run.

http://geesu.net/gallery2/phpinfo.php (if you want to check settings)

If I use the CGI binary it works perfectly fine.  Note: All other PHP things have worked fine with the ISAPI module, I only found exec and system to be broken in my tests.

BUT, if the file you want to execute is in windows/system32, the program will execute and you will receive a result, otherwise you will not.

Also safe_mode is off, so it's not restricting the directory.

Reproduce code:
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	// This will NOT work (assuming netstat.exe is copied to c:\tools\
	$command = "c:\\tools\\netstat.exe";
	echo system($command);

	// This will work as its in system32
	$command = "netstat";
	echo system($command);
	
	// This also works
	$command = "c:\\windows\\system32\\netstat.exe";
	echo system($command);


Expected result:
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I expect to see the netstat result on ALL 3

Actual result:
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The first echo returns nothing, the last 2 return results