Unable to update column in user in android

I have added a column “subscribe” in user table. I tried to change the value in this column by
user = Backendless.UserService.CurrentUser();
Backendless.UserService.update( user, new AsyncCallback<BackendlessUser>()
{
@Override
public void handleResponse( BackendlessUser loggedUser )
{

if( user != null )
{
user.setProperty(“subscribe”,“monthly”);
}

}
@Override
public void handleFault( BackendlessFault fault )
{
new AlertDialog.Builder( getContext() ).setMessage( "Server reported an error: " + fault ).setIcon( android.R.drawable.ic_dialog_alert ).setPositiveButton( android.R.string.ok, null ).show();
}
} );
but it is not updating the value in the table.

Hi, ansh.
Try such sequence of code.

user = Backendless.UserService.CurrentUser();
user.setProperty(“subscribe”,“monthly”);
Backendless.UserService.update( user );