Custom User (AbstractBaseUser) add to Group error

I cannot seem to get Groups to work with the Custom User Model. In the admin panel attached is the view. Its missing the box on the left with the assignment of adding and remove groups. I’ve tried checking and even unregistered and reregistered in the admin.py view. Codes below for my custom user class and admin. Code works for normal user logging in etc and for admin but i want the groups assignment to work which is just not working . Any help much apprecaited as i seem to be hitting a wall

class UserAdmin2(BaseUserAdmin):

# The forms to add and change user instances

form = UserAdminChangeForm

add_form = UserAdminCreationForm

# The fields to be used in displaying the User model.

# These override the definitions on the base UserAdmin

# that reference specific fields on auth.User.

list_display = ['email', 'admin','organisation','disipline']

list_filter = ['admin']

fieldsets = (

    (None, {'fields': ('email', 'password')}),

    ('Personal info', {'fields': ('fullname','organisation','disipline','subdisipline','designation','expiration')}),

    ('Permissions', {'fields': ('is_active','admin','staff','is_superuser','groups','user_permissions')}),

)

# add_fieldsets is not a standard ModelAdmin attribute. UserAdmin

# overrides get_fieldsets to use this attribute when creating a user.

add_fieldsets = (

    (None, {

        'classes': ('wide',),

        'fields': ('email', 'password', 'password_2')}

    ),

)

search_fields = ['email']

ordering = ['email']

filter_horizontal = ()  

admin.site.register(CustomUser,UserAdmin2)

class CustomUser(AbstractBaseUser,PermissionsMixin):

email       =   models.EmailField(max_length=254, unique=True)

fullname   =   models.CharField(max_length=254, null=True)

disipline   =   models.CharField(max_length=254, blank=False, null=True)

subdisipline    =  models.CharField(max_length=254, blank=False, null=True) 

organisation   =   models.CharField(max_length=254, blank=False, null=True)

designation     =    models.CharField(max_length=254, blank=True, null=True)

signature = models.CharField(max_length=100, blank=True, null=True)

expiration     =  models.DateTimeField(null=True) 

is_active = models.BooleanField(default=True) #according to django contrib doc, is_active returned here

admin = models.BooleanField(default=False)

staff = models.BooleanField(default=True)

objects =   UserManager()

mdlSetGetField = mgrSetGetfields()

USERNAME_FIELD =   'email'

REQUIRED_FIELDS =   ['fullname','disipline']

def __str__(self):

    return self.email

def get_full_name(self):

    return self.fullname

def get_short_name(self):

    return self.fullname

@property

def is_staff(self):

    return self.staff

def is_admin(self):

    #"Is the user a member of staff?"

    # Simplest possible answer: All admins are staff

    return self.admin

#def is_active(self): #after referring to django contrib docs, this does not work

    #"Is the user a member of staff?"

    # Simplest possible answer: All admins are staff

#    return self.active

def has_perm(self, perm, obj=None):

    "Does the user have a specific permission?"

    # Simplest possible answer: Yes, always

    return True

def has_module_perms(self, app_label):

    #"Does the user have permissions to view the app `app_label`?"

    # Simplest possible answer: Yes, always

    return True

#changed active to is_active

Notice that the actual widgets being rendered in your form aren’t the same widgets as used by the admin for the default user object. Those widgets you have work, they’re just not the ones that the default UserAdmin uses.
I haven’t found any specific reason why, or how that widget is selected by the admin, but you might be able to dig around into the source to find it.

ok removed

filter_horizontal = ()

and it started working…took a while - thanks again