I use to bring PDFs into Postscript by this method. The trick in this case is to have an instance of acrobat already opened.

Try: open Acrobat manually. Start your program, a frame may be visible but will vanish and your program will continue.

my code:

my $pddoc = Win32::OLE->new("AcroExch.PDDoc");
$bef = "\"c:\\Program Files\\Adobe\\Acrobat 8.0\\Acrobat\\acrobat.exe\
+"";
$bef.= " /n /s /o /h /t $inpfil \"DT6180PS_9111\" \"Xerox DT6180 PS3 v
+2.0\" \"/\"";
system( $bef );
[download]

works perfect. I redirect the output to a printer, where the application redmon redirects the output to a file. By this way you can get any printercode to a file in a command mode. Good luck!