But I have already done the kernel upgrade. I thought of upgrading the kernel and giving it a try. After that when I logged into the older kernel version, my wireless popped up stating that wireless connection are available. I was able to connect successfully.
But the internet is very very slow. It is proceeding in bytes per second. And frequently am getting Problem loading page.
And I am still unable to log into the upgraded kernel. Wondering if I should remove the earlier kernel version as internet works fine here.