Newbie: Debian upgrade 2.2 to 3.0 stops apache

Just upgraded from Debian 2.2 to 3.0, fortunately on a test machine, but now
Apache won't start. Problem I presume is related to Tomcat. Error given is

Syntax error on line 69 of /etc/apache/httpd.conf:
Invalid command 'JkWorkersFile', perhaps mis-spelled or defined by a module
not included in the server configuration

old versions
ii apache 1.3.9-14.3 Versatile, high-performance HTTP server
rc tomcat 3.2.1-1 Java Servlet 2.2 engine with JSP 1.1
support

new versions
ii apache 1.3.26-0woody3 Versatile, high-performance HTTP server
ii tomcat 3.3a-4woody1 Java Servlet 2.2 engine with JSP 1.1
support

Any thoughts one what the problem is/the way fwd

Thanks in Advance

GC