Streaming media sites are blocked

[firefox]

I do not know if this is the proper forum

i have pfsense 2.1.5 with
snort
squid
squidguard
pfBlocker
HAVP antivirus

and some of the Streaming sites are blocked
i do not get any Message

i just get an error
When I stopped squidguard more site back to work good

But still some Streaming sites are blocked

How do I fix it
What could be the problem
What is not configured correctly

[doktornotor]

So stop proxying/blocking them… (worse yet, proxying with antivirus). Only install such package that you are capable of handling.

[KOM]

i do not get any Message

i just get an error

And what would that error be?