[xubuntu] Wireless won't connect again after disconnection

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http://ubuntuforums.org – When my laptop somehow loses Wi-Fi connection (out of range, hibernating), it won't connect to the network again. It asks me like 4 times to insert the password, but it's already filled in, and it's the correct one. After those 4 times it just says disconnected, and the network disappears from the list. To fix this I have to restart my computer, but when I lose connection again, it just starts all over. I'm running Xubuntu 12.10 (Hardware)