PfSense 2.0 as Transparent Proxy with Blank sgerror.php page

[albertoe]

Hi,
i am using Pfsense 2.0.1 configured as transparent proxy with Squid and Squidguard.
Everything works like a charm, except for the error page that should appear every time a user tries to access a blacklisted site.
The result is always a https://x.x.x.x/sgerror.php?url=blank….. and the webpage is blank and https.
I've specified a redirect to a external url but seems the webconfigurator is ignoring every modification i make to the redirect mode/redirect info.
Doing more researches the problem is that PfSense does not put the 404 code on the ?url=.
If i change "blank" to 404 on the URL i can see the error page.
Can someone help me about it?
Thanks :-)
Ciao.
Alberto.