there is no WPA2 option in authentication list.
As you can see at
http://en.pardus-wiki.org/Pardus:Installation2009#Wireless_configuration the Security type for WPA2 (or WPA2 Mixed) = WPA Pre-share.
Read the manual over there.
After applying "Scan [2]"
and "Select at [3] the connection", the type of key is automatically detected (and filled-in) after Security type:
it is asking for password not the username.
You have to supply the value of the key and
not the password of the user.
but without authentication it is connecting..
When you are in this situation what's the result of
iwconfig
and
ifconfig
in a konsole