insufficient privileges - execute immediate

[SPRJ2]

I granted dba to the user,
but the user gets "insufficient privileges"
when executing:

create table gebruikers
( id varchar2(11), ww varchar2(11), naam varchar2(25), voornaam varchar2(25));

create or replace procedure create_user(p_id varchar2, p_ww varchar2)
is
pragma autonomous_transaction;
Begin
execute immediate ‘create user ‘||p_id||’ identified by ‘||p_ww||’’;
execute immediate ‘grant connect to ‘||p_id||’’;
End;
/
create or replace trigger tr_user
after insert on gebruikers
for each row
begin
create_user(:new.id,:new.ww);
end;
/

[PAVB]

First, no reason to grant DBA to an user.

Second, may we ask:

-- which one is offending user?
-- who owns the table and the procedure?
-- when executing "what" the user gets the error?

[davey23uk]

you havent granted create user explicitly to the user