Wifi not working on Compaq Presario V3130 with Ubuntu 11.10

view story

http://askubuntu.com – I am currently using 11.10 on my Compaq Presario V3130 machine. When recently I tried to use wireless on my laptop i found that it is not working as the option of "Enable Wireless" is not highlighted in the network manager. My wifi switch is on and earlier I had used wifi with 11.04. Please help on this as don't know much about Ubuntu. Thanks. Wifi Adapter is : intel corporation pro/wireless 3945abg (HowTos)