It seems Firefox 3 and IE 7 in my pc DOES NOT accepting cookies.
All required steps have taken by me to enable but still has same problem
Even re-installing does not solve :(
Guys.
finally my problem has been solved.
There was a Spyware & adware issue. I scan PC with Antivirus and it has detected and cleared bugs.
Now I can use use firefox and IE.
amrith92 and Doctor Inferno
Thank you for your suggestion :)