Hi donniewillie and welcome.
You may have a conflict with the two programs if they’re running at the same time. Did you remove DVD43 and restart before installing AnyDVD (it may not be necessray to restart but I think it’s always a good idea)?
Note: From what I could find, DVD43 was last updated with v4.31: (April 9, 2008). If you are looking for a free decryyptor, also look at http://www.dvdfab.com/free.htm