[ESS] Symbol's value as variable is void, again

[Tom Masterson]

Here's the message I'm getting when I try to 
start up a Stata session in emacs:

font-lock-eval-keywords: Symbol's value as variable is
void: inferior-ess-font-lock-keywords

And the contents of the ESS buffer:

(STA): ess-dialect=Stata , buf=farmtransactions.do 
(inferior-ess 0): ess-start-args=TERM=emacs stata  
ess-setq-vars-default 0: ess-language=STA,
-dialect=Stata, buf=nil, comint..echoes=nil,
comint..sender=comint-simple-send
ess-setq-vars-default 1: ess-language=STA,
-dialect=Stata, buf=nil, comint..echoes=nil,
comint..sender=comint-simple-send
(inf-ess 1): lang=STA, dialect=Stata,
tmp-dialect=Stata, buf=farmtransactions.do
(inf-ess 1.1): procname=Stata temp-dialect=Stata,
buf-name=*Stata* 
(inferior-ess) Method #3
start=/home/tnm/work/Dissertation/Analysis/03_LandMarkets/
buf=*Stata*
(ess-setq-vars-LOCAL): language=STA, dialect=Stata,
buf=nil, comint..echoes=nil,
comint..sender=comint-simple-send
(inf-ess 2.1): ess-language=STA, ess-dialect=Stata
buf=*Stata* 
(inf-ess 2.2): start args = TERM=emacs stata ,
inf-ess-start-args=TERM=emacs stata  
(inf-ess finish [STA(Stata), env(nil,nil)]
(ess-multi 0):  inf-ess-start-args=TERM=emacs stata ,
comint-..echoes=nil
(i-ess 1): buf=*Stata*, lang=STA, comint..echo=nil,
comint..sender=comint-simple-send,
(i-ess 2): buf=*Stata*, lang=STA, comint..echo=t,
comint..sender=inferior-ess-input-sender,
(ess-setq-vars-LOCAL): language=STA, dialect=Stata,
buf=nil, comint..echoes=t,
comint..sender=inferior-ess-input-sender
(i-ess 3): curr-buf=*Stata*, comint..echo=t,
comint..sender=inferior-ess-input-sender,

I tried altering essd-sta.el as was suggested on 
the list, but alas, no joy.

Emacs Show Version:
GNU Emacs 21.4.1 (i386-pc-linux-gnu, X toolkit, 
Xaw3d scroll bars) of 2005-03-17 on trouble, 
modified by Debian

not sure how to get the ess version 8{],
I guess whatever version is in the latest debian
package...
Thanks for any help!
tom