Cannot pull image via facebook login in production mode

HI,
   1.
       In developement mode,
            i can be able to get the facebook  profile image through facebook login
       In production mode,
             i cant able to get that image. it showing the default image..
           Wat i need to change to work this out.
  2.
       i need to get the zipcode from facebook while login with facebook api, i tried a lot.but i am not get it.
   
       pls post the reply if anyone knows..
        Thanks n advance..