I tried another way and it has worked for me..
I disabled the Intel Proset wireless utility and enabled the WZC aka wireless zero configuration.
If you are not sure how to do it refer the link below.
or go to Start -- Run -- There type services.msc. In the services local window, the third one from last is Wireless Zero Configuration, right click on it click start.
Try adding the network manually.
For adding the network manually
Goto Start -- Run, there type ncpa.cpl
In the Network connection window, right the wireless network connection, goto properties..
Goto the wireless networks tab.
In which you will find the Preferred networks box, there if you find your network there in the box, select it click remove.
Then click add -- Enter your network name(SSID), select the security option(WEP, WPA, whatever it may be), Uncheck the check box which says "The netwwok key is provided to me automatically"
Type the security key.
Then goto to the Authentication tab, Uncheck the check boax which says"Enabled IEEE 802.1x Authentication, click OK.
Your network will automatically get connected.