Delphi Thread Error

I use a freeware button component (attached) which works fine at runtime, however when you run an application from within the Delphi 7 IDE it throws a "thread error" when you try to close the application. In Delphi 4 it doesn't throw an error, but it sometimes hangs requiring a ctrl-alt-delete. I have attached the source code should you wish to examine it, but please don't start work until the bid has been accepted. ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Installation package that will install the software (in ready-to-run condition) on the platform(s) specified in this bid request. 3) Complete ownership and distribution copyrights to all work purchased. ## Platform Delphi 7