Have you ever run grants from plsql?

I'm trying to do just this with dinamic SQL.

Someone gave my user the DBA role & now I have to create users & run its grants using PL/SQL.

I'm trying with SQL Navigator & when I debug my procedure SQL Navigator's debugger tells me the following

Error -1932: ORA-01932: ADMIN option not granted for role 'CONNECT' ORA-01932: ADMIN option not granted for role 'CONNECT' ORA-06512: at line 9

It happens just after parse.

The code I've used is:

--Grant connect

      v_run := 'grant connect to ' || UPPER (pi);--v_run varchar2 (200)
      v_run_id := DBMS_SQL.open_cursor;--v_run_id binary_integer
      DBMS_SQL.parse (v_run_id, v_run, DBMS_SQL.v7);
      w_run := DBMS_SQL.execute (v_run_id);--w_run binary_integer
      DBMS_SQL.close_cursor (v_run_id);

I've been looking for some documentation & I've found this procedure

PROCEDURE DBMS_AQADM.GRANT_TYPE_ACCESS (user_name IN VARCHAR2);

I don't understand what is this procedure useful for. Could it be useful for me?

Thank you in advance,

                Patxi.