Why doesn't my IPhone 4s want to connect to the home Wi-Fi?

I got it today and tried connecting it to the house Wi-Fi and it doesn't tell me i have the wrong password or anything it just has the little circle next to it like its connecting but it does not really connect, at least i don't think it does cause it doesn't say connected. I have an ipad 2 connected to the Wi-Fi and it works perfectly
I tried erasing all the data to that Wi-Fi, turning it off and then entering the password again and it still doesn't work:/

Click on your Wi-Fi under network settings and try Renew lease, works for me

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