Description:
------------
I recently had to upgrade a host to Windows 2003 Server, IIS 6 and PHP 4.3.4. Everything seems to work OK except when I try to use exec() or passthru(). I get errors similar to the following

Warning: passthru(): Unable to fork [c:/Inet/MIS/sql/echo.bat] in c:\inet\MIS\MIS\Conv.php on line 91

Both exec() and passthru() give the same error.

I stall have another host running Windows 2000 Server, IIS 5 PHP 4.3.2 and the same code works fine.

I've checked all the config options for scripting and turned them all on! By default 2003 Server and IIS installs in a heavily protected mode

Reproduce code:
---------------
    if ($Action == "PerlBat")
        {
        $Ans = passthru("echo.bat", $Ret);
        }

echo.bat
--------

echo "hello bat !!!" 1>echo.outbat 2>>echo.err

NOTE: the above is just a simple example script, my applications run much more complicated scripts

Expected result:
----------------
I expect the script to execute. 

Actual result:
--------------
Script fails to run.