On Dec 29, 2005, at 10:55 PM, Ted Spencer wrote:
>  I then got the 10.4.3 updater installed. In both cases, the  "AFP  
> protocol" message (above) indicates that no connection can be made.

http://docs.info.apple.com/article.html?artnum=301183

A quick google on ""This file server uses an incompatible version of  
the AFP protocol: you cannot connect to it" shows many others having  
this problem with Tiger.  I haven't used sharing between 10.4 and OS 9

http://www.google.com/search?client=safari&rls=en-us&q=This+file 
+server+uses+an+incompatible+version+of+the+AFP+protocol:+you+cannot 
+connect+to+it&ie=UTF-8&oe=UTF-8