[ubuntu] Wireless network problem

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http://ubuntuforums.org – Hello all, I am newbie to ubuntu and I installed ubuntu 10.04 along with windows XP. I am using compaq 610 laptop and using NETGEAR for wireless connection. I created a new wireless connection in Network Manager with the security key, but unfortunately it is not connected. Sometimes it asks my authentication to connect with the security key for three times and finally shows "Connection established" but there is no network connection. What should I do to get the connection properly? Thanks in advance, yuvi... (HowTos)