WordPress Problem with Domain

Hello,
I was running my wordpress blog on tg2spot.com but for some reason, i changed my domain to gizmonewz.com and kept the same hosting.

I entered same blog path with new domain, but it is redirecting to old domain. I backed up the database, installed new WP and restored, but again same problem facing.
Before restoring the Database, it was not happening like that.
Please help me..