executing DBMS_SQL

I am executing the following code-snippet:

    DBMS_SQL.PARSE (L_CUR,
                L_SQL_TABLE,
                L_SQL_TABLE.FIRST,
                L_SQL_TABLE.LAST,
                FALSE,
                DBMS_SQL.NATIVE);

and I am getting the following error:   Error: ORA-01031: insufficient privileges  [ -1031]

The user executing has execute privs on DBMS_SQL & DBA-privs

Can anybody help?

THX in advance.