Iam Connecting MWC with fb Account.Now my Q is Without fb how can i ?

use facebook to log in MyWorldConnect.com

I don't think you can do that. Your data and information are taken from your facebook, so the username won't work on MWC. Beside, you don't know what is your p**word on MWC, right? Because there is no p**word for you to use, and you can't logged in with your facebook p**word. It's been embedded in and the p**word for your MWC account might be some kind of code or captcha. Your MWC account is interlinked with your facebook account and there is no way that you can logged in you MWC account without logging in through you facebook account.. Unless you know how to hack. :D It's like a special entry. You are not a legitimate member even though your name is in these website. Is that clear? :D

Facebook is the medium for your MWC account