Hi,
Make sure you restart the module in the WebUI, as I found that using /etc/init.d/ebox squid restart' didn't cause DansGuardian to reload. I did once restart DansGuardian itself (/etc/init.d/dansguardian restart) but found that the eBox scripts wouldn't restart it properly until I restarted the whole things (/etc/init.d/ebox restart)
Kind regards,
Geoff
p.s. did you modify the original template.html, or create a new one? if you replaced it, make sure the permissions and the case (e.g. template.html *NOT* Template.html) are correct.