Front two ports probably dont get enough power to them, which is why it worked but not correctly.
Now you can think about securing it and looking at all the other kewl ways you can break it and wonder why it isnt working
Which included MAC filtering, WEP, 801.x security policies, dedicated firewalls, DMZ's and the lot
But serious, if its open and free access take everybodies advice here and secure it

Do you want Fred next door using it for free access and anything else that they might wanna try?
But stick it in another post so we can all post/spam in that one

Thanks to everybody else as well