Vikram
I would redo the factory reset
unplug power, press pin in and hold whilst reconnecting the power, still holding pin in for another 30 seconds, let pin go and go and have a tea whilst the Shield resets itself. A lot of problem come from people tiring to use the shield too soon.
once the shield is up, download the hotfix and run, again leave about 10 minutes to make sure it's done.
log in via gui and check firmware version.
if you change from router to bridge mode you will have to run the hotfix again to update the bridge mode ( each mode is seperate)
if you are still having problem just let the forum know
roadrunnere42