I'm using VS 2008 framework 3.5 with infragistic controls. Windows xp. When I build my program and run exe from my release folder it works fine. When others try to install and run, it doesn't work. Nothing happens. No error message. Not sure what is the issue. As far as I can tell, they have framework 3.5 installed. Not sure if this is a valid check but under windows/microsoft.net/framework there is 3.5. This is a one form app so not much to it. I mentioned Infragistics because this is the first time I used them and at first I left of the dll as part of the install. Any ideas? I'm going to create a small app for framework 2.0 and 3.0 to see if those work. Thanks in advance.