Hello you guys

I'm pretty new to Oracle...

I trying to get familar with advanced queueing (AQ) and
built up therefor a small sample procedure.

the beginning looks like:

CREATE OR REPLACE PROCEDURE intproccom IS
tmpVar NUMBER;
Enqueue_options DBMS_AQ.enqueue_options_t;
Message_properties DBMS_AQ.message_properties_t;
Message_handle RAW(16);
Message prg.message_typ;


After compiling I get an error message like:

identifier "DBMS_AQ" must be declared

What is the problem ?
I really appreciate any help!

Thanks
Marc