I need help with this. When I try to start some JJ2 programs,like JazzEd,an error message appears: "This application has failed to start because MSVBVM50.DLL was not found. Re-installing the application may fix this problem." What is MSVBVM50.DLL and why the error appears? Those programs worked fine before.

A quick Google search would've set you straight, but you don't have the Visual Basic 5.0 runtime installed. You can get it here.

Thanks a lot. It works now.