Atheros wifi card: problems connecting to wifi

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http://chakra-project.org – Hi everybody, I've looked around the forums but haven't found a solution.I just installed Chakra 2012.02 on a Acer Timeline 8020TG and cannot connect to my wifi network.I inserted the password correctly and after a while trying to have an IP it starts "Waiting for authorization" and fail to connect.The wifi card is a Atheros AR928X.On the same laptop I've installed Ubuntu 10.04 and openSUSE 12.1 and there is no problem connecting there.I've already tried uninstalling ndiswrapper as suggested here and also disabling and enabling again the iwlagn modulesudo modprobe (HowTos)