I have a Technomate (not same model as yours) but to access the option you need I go MENU, SET TOP BOX INFORMATION, then press RED button on remote. This will then give the option to enter PASSWORD. I use 1234 for the password but some receivers use 2004. Once you have done this have a look in the MAIN MENU and you should now have an option called CAS SYSTEM or similar.
Remember that I have a different model than you so the above may not work.