quick procedure (more complete instructions here)

tar xfvz WebSecurity632_Setup_Lnx_it.tar.gz
./install.sh

Follow the linked instructions then if you restart squid it will not works!!
if you check for errors you'll see in /var/log/messages

Oct 30 14:58:26 itb-s0039 (squid): The redirector helpers are crashing too rapidly, need help!
Oct 30 14:58:26 itb-s0039 squid[25808]: Squid Parent: child process 25889 exited due to signal 6
Oct 30 14:58:29 itb-s0039 squid[25808]: Squid Parent: child process 25927 started
Oct 30 14:58:29 itb-s0039 (squid): The redirector helpers are crashing too rapidly, need help!
Oct 30 14:58:29 itb-s0039 squid[25808]: Squid Parent: child process 25927 exited due to signal 6
Oct 30 14:58:32 itb-s0039 squid[25808]: Squid Parent: child process 25965 started
Oct 30 14:58:33 itb-s0039 (squid): The redirector helpers are crashing too rapidly, need help!
Oct 30 14:58:33 itb-s0039 squid[25808]: Squid Parent: child process 25965 exited due to signal 6
Oct 30 14:58:33 itb-s0039 squid[25808]: Exiting due to repeated, frequent failures

if you try to start the websense redirector you'll get this error:

./WsRedtor: error while loading shared libraries: libstdc++.so.5: cannot open shared object file: No such file or directory

Solution:

create a new file
vim /etc/ld.so.conf.d/websense.conf

#####CONTENTS#################
/opt/Websense/bin
#####CONTENTS#################

ldconfig -v | grep -i sense
/etc/init.d/squid start

if everything is ok in /var/log/messages you'll only this:

Oct 30 15:11:25 itb-s0039 squid[26062]: Squid Parent: child process 26065 started

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