Using Two Wifi Networks on the same subnet. Will not work when connected to one network

So i have two wireless networks in my house. When connected to one AP windows 7 identifies the network and works fine. The issue is that the computer is used on the other side of the house and is supposed to connect tot he other network. When it does though it says unidentified network and refuses to connect to the internet. When a ethernet cable is connected to the 2nd router/ap it works great. But it refuses to work over the wifi.... ideas?

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