Problem using facebook app?

[VIKKU]

i've got a samsung gt s3770k.
in games folder,(Menu-Games)there is a facebook app.
no matter how many times i try, it says either"couldnt establish connection to the network" or "incorrect username and password"
i know my username is not my name on fb.
its what comes in the adress of my profile.
need help.
I Use BSNL 3G sim.
the browser in the phone is working.
Also there is another facebook in the menu.
if i try it, mostly it takes a lot of time

[Joe]

On the facebook apps, your username is your email, not your facebook URL. Try using that instead.