squid acl bypassing

Hello,

I have squid 2.5 on FC4 and am using it to control internet access on my pc.
The problem that I am facing is this:

acl blocked dstdomain "/etc/squid/blockfiles.acl"
http_access deny blocked

is not working,it is being bypassed.

The contents of /etc/squid/blockfiles.acl are

.google.co.in
.yahoo.com

But the following thing is working fine

acl blocked dstdomain .google.co.in
http_access deny blocked

The access permissions for the file /etc/squid/blockfiles.acl are 644.

So, nebody having ne idea about this please reply.

Thanking you in advance.