>NOTE: Beside renaming the subclasses I also renamed the library that contained them to my conventions.

Alex -
this always gets messy when you rename both vcx's and classes. In the class browser, try redefining each subclass to point at the renamed parent class.

And keep a backup copy... hopefully you have a copy of everything from before you started renaming, you might need to go back to them to make sure everything fixed itself. Good Luck!