Hi.

I had this problem as well, and have found the answer (to my problem) here:

<http://www.adobe.com/support/techdocs/2bc3a.htm>

Basically, acotray.exe needs to be running, otherwise the error message "unable to print .... \*.pdf" appears when you print to distiller.

At installation, a shortcut to acotray.exe is (meant to be) put in the startup folder, so that it is started at startup.

The "port" change (to change the destination directory) will then also work - even through *.pdf gets added.

Hope this helps you.
Thanks.
Bruce.