ATI Multimedia DVD Player Version 6.2

Has anyone had a problem with this software not playing older region one DVD titles?
I have it works fine on newer titles (like US Marshalls), but will not play older region one titles (like Deadly encounter). It gives a region code error and will not open the DVD. I called ATI about this and they told me 'we have no know problems with that software'. I loaded Cyberlink's PowerDVD version 2.55 on the same machine and it played all the titles perfectly. Does anyone have any ideas?