as it is a wpa,wpa2 personal connection but i cant change it in the network wireless setting ...It keeps on coming as a wep connection but when i type my network password the connect button on bottom of dialog box fades out.but when i add some more characters it fades in but with the correct password only we can connect so its useless..As i'm new to linux and want to be a linux user i expect answes from the pros...
I'm not a pro but there may be issues with your particular wifi adapter. Please post the results of this command:
It should list your wifi device(s).
In particular there has been in the past issues with the Broadcom network controllers. There is a community help wiki page on Broadcom wifi devices and a quick search shows that there other users with problems getting Broadcom wifi devices to work on 12.04.
Hope that helps! It did for me. See my post about it. I had very similar issues as you - greyed out "enable wifi", etc. In particular my solution (after searching the ubuntu forum, ask ubuntu and community help docs) was to remove the STA drivers using the Ubuntu Software Center, and installed the b43 drivers instead. But first I made sure that my wifi adapter was supported by b43 on the linux wireless site.