iPhone is connected to Macbook Hotspot but unable to actually surf
Although my iPhone is connected to the Wifi (Hotspot by Macbook) neither Safari nor Whatsapp work nor anything else. It only works if I delete the password of the Wifi, but than it is open for everyone. It used to work with a WPA2 password as well, but all of a sudden no matter how often I change the password or the channel, the iPhone won't be able to get a 'real' connection. Only if I take out the password completely. I've no idea why that is, because the iPhone works with any other Wifi and the Macbook created the Hotspot and it works if there's no password and it used to work with a password too... So I'm really confused what the reason could be.
Suggestions how to solve this problem are highly apreciated!
Thanks!
iPhone 4S, iOS 6.0.2