Problem with www version of domain in zone file

I am trying to create a zone file which points example.com and www.example.com to my server's IP address. I read the docs, but am still having a hard time with it. Currently, the non-www version works, but the www doesn't. I don't get an config errors when I start bind. Here is my zone file:

$TTL 86400

@ IN SOA ns1.myserver.com.  postmaster.myserver.com. (
                        2010121801      ; serial number YYMMDDNN
                        1800 ; Refresh
                        600 ; Retry
                        864000 ; Expire
                        1800 ; Min TTL
                        )
                IN NS ns1.myserver.com.
                IN NS ns2.myserver.com.


IN A 99.99.99.99
www IN CNAME @