DVDx 1.8a ANV_DISP.DLL ERROR - HELP

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DVDx 1.8a is giving me an error of anv_disp.dll blah blah, while trying to use it under WINXP. I had successfully used DVDx 1.6a previously under WINXP and no problems. When upgrading to 1.8a, I was prompted to either replace anv_disp.dll with the new or keep the existing one. And you guessed it I replaced it. ANYONE out there have any thoughts..... I think I will try and reinstall 1.6 and try keeping the anv_disp.dll file from it. But I would like to use the new features of 1.8. And I would appreciate it SETARIP if you too commented on this. Thanks.
satr