DVD zones.

I’ve just installed a DVD player on my WIN 98 machine with Cyberlink’s POWERDVD (ver 3.0).
Trouble is the multizoneing. It has gives me 5 chances to change zones and then that’s it. No more DVD’s. It means that of my 5 DVD’s that I have, I can now only play 1. It no longer allows me to change zones and infact my area is greyed out.