I need to change url_rewrite_program directive; when i do squid wont start

[sloan]

I have changed a standard directive in the GUI.  On the bottom of the general settings page.

url_rewrite_program  /usr/local/libexec/adzap

When i do squid wont restart

I have also tried to add is to squid.inc and squid wont restart            located in    /usr/local/pkg/squid.inc

I can change this directive on a different squid server that is not a pfs package.      Both pfs and my other server versions are 2.6 stable.

Does anyone know how to successfully change this directive?

[dvserg]

squidGUI > Custom options
example for SG

redirect_program /usr/local/bin/squidGuard -/usr/local/etc/squidGuard/squidGuard.conf;redirector_bypass on;redirect_children 3