Squid not deny URL on AWS EC2 windows instance

HI,
i have installed squid and updated squid conf as below. But its still allowing to access google.com and youtube.com. Can you people please help me ?

INSERT YOUR OWN RULE(S) HERE TO ALLOW ACCESS FROM YOUR CLIENTS

acl block dstdomain .google.com .youtube.com
http_access deny CONNECT block
http_reply_access deny block
#http_access allow new