I do appreciate all of the assistance you all have given... I am still getting errors, but I'm trying to work through them. My question:

Is it possible that when the database and code where transferred from an old server to a newer one, updated versions of PHP & MySQL that the codes that worked in the older versions are not compatible with the newer version? I have researched but could not find if PHP is backward compatible.

Yes, for example in PHP 5, if php is configured so that globals aren't registered, you will have to call to fields by either $_POST or $_GET. Same goes for $_COOKIE.
There's more things changed, methods that aren't (standardly) supported anymore.

However, when creating a class, you would create a function with the same name as the class to have it execute when a new object was created. In PHP5 that is replaced by the __construct() function. However, when a __construct() does not exist, it looks for a method that has the same name as the class and treats that as the construct method.

Dave.

I have also learned that with 5.2 you need to use mysqli_ instead of mysql. Dont know why but I was recieving a lot unexplainable errors before I added the "i".