>I'm using VFP7. My codes run OK under the development environment, but when I have it compiled into an .EXE, the program will not run at all. It gives me 'class name is invalid' error. I have no clue why. Can anybody please help???? Thank you all!!

It sounds like one of the class libraries used in the application isn't included in the project but is on the path in development. Try to build executable with 'Recompile All Files' checked.