I reset my firewall settings, through webadmin, and Changed using "Static IP" to "USE DHCP"
First Few boots It did nothing and booted without network configuration.
However after two days,, It booted just fine. and everything is working as it supposed to..The system now using DHCP instead of Static IP.
I have no idea what went wrong with static IP !!
Now its working, so can't complain.
Thanks.