We are working on an XNA game which will be released very soon. When we upgraded from XNA 3.1 to XNA 4.0, we found it wouldn’t compile and run. All submissions to Microsoft’s XBox Live Indie Games marketplace now only accept 4.0 submissions.
If you have an old video card, an error might appear.
You will need to change the settings for XNA Game Studio. Right click on the project and select properties.
Select the Use Reach option and then close the properties window.
Click on the Start Debuging (or press F5). The application will run.