Need help to deny IP access on network

I have a Linksys WRT54g vers 2 and I am using a Linksys Range Expander. I used to be able to go to my router admin > Access Restrictions and Enable policies that would keep certain computers from gaining access to the Internet when my computers were hardwired. Now that I have 3 computers that are using the wireless connection via the range expander, those policies are no longer working. i.e. a computer with IP 192.168.1.104 still has access after I enable the Deny Policy.

Please let me know if I have explained it well enough or if you have any questions that need clarification.

Any help or suggestions is appreciated.