Halo for PC doesn't connect for multiplayer with parental controls

For standard user accounts that have parental controls turned on, halo for PC
cannot host a server or connect via internet for multiplayer games. It can
retrieve a list of server fine, it just won't connect to a game.
Administrator account works fine. Standard user without parental control
works fine. Shutting off the firewall didn't help, so I'm pretty certain
it's something with the parental controls feature.

Anybody have any ideas?