delivery level 5

I'm trying to crush the size of "small" control panel app written with 
CAPI.  I can get it to run all the way down to delivery level 4, but when I 
deliver at level 5 I get a dialog box that says

	"Output" is not a defined mode [OK]

I've seen this on other apps, also, and have never understood what I'm 
doing wrong[*].  Any suggestions / comments?

My delivery .lisp file is:

(compile-file (current-pathname "dllInterface-dff.lisp") :load t)
(compile-file (current-pathname "front-panel.lisp") :load t)
(compile-file (current-pathname "rundll.lisp") :load t)
(deliver 'rundll "stswrt" 5 :multiprocessing t :interface :capi)
(quit)

and the .bat file that invokes it is:

"F:\program files\xanalys\lispworks\lispworks-4200.exe" -init deliver.lisp

thanks
pt

[*] In fact, I don't understand the delivery process very well.  Is there 
something I could read that would give me a better feel for what's going on 
and what the trade-offs are (including academic papers)?