Bought and installed Extreme today and it was working fine at first. Fast forward a few hours and now my iMac can't find the router. On my iMac I have no internet nor can it find my router. I log on to my MBP, I have internet and the MBP can see the router. Both are connected wirelessly yet only one has access to internet. The router is located right next to my iMac so I know distance is not the problem. Thoughts?