to make mod jk under debian enter the following command to make sure your compiler environment is working

set up your environment with
apt-get install libtool autoconf gcc apache2-prefork-dev
great.. now we are ready to compile

copy the tomcat source native directory over to the server and from within native/ run the following

make sure the support dir is sitting at the same level

./configure --with-apxs=/usr/bin/apxs2
make
make install

then after all that

Libraries have been installed in:
/usr/lib/apache2/modules

Or download a precomiled binary from http://mirror.public-internet.co.uk/ftp/apache/tomcat/tomcat-connectors/jk/binaries/linux/jk-1.2.26/i386/