I am using za free antivirus + firewall :

What frustrate me is I can not block an application from access the internet

for example, from the application control

find the application which want to blocked,say firefox
change its
smartdefense ->custom
trust level --> ask
outbound trusted -->ask
outbound internent -->ask
inbound trusted -->ask
inbound internet -->ask

click ok

to my surprise, that firefox still can access internet without ask permission??

is it a bug ??????