D-Link DIR-655 :: Blocking Access To Websites Doesn't Seem To Work

Like others I see on this board, we've got middle- and high-school age kids whose access to FB and other sites needs to be controlled/scheduled.

I thought the DIR-655 was great, in that it has features that, on the face of it, would seem to be ideal for blocking domains and restricting access.

My problem:  I've never been able to get this to work.

I've set up schedules and created lists of domains that I want to limit access to according to the schedules, but the only constraint I've ever gotten to stick is blocking access completely to the router.

*None* of the schedule-based or website-based access controls have ever worked; I'll put the block in place to my daughter's computer's MAC address so she shouldn't be able to get to youtube or facebook, save, bounce the router, but then I go by her room and she's still busily chatting away online to her FB friends.

Based on similar posts I've seen on this forum, this may not be a unique problem.

So in a nutshell, this is what I want to do:

1) Block certain computers (identifiable by MAC address)

2) from being able to get to particular named domains (and any of their sub-domains)

3) according to a schedule that I can create and modify.

My preference would be to do this in the router, but again, responses I've seen here suggest that may not be possible.