hi Marcus
Welcome to the AdminStudio community.
Did you repackage application into MSI or author it from scratch?
It's possible that you have set certain permissions on your MSI package which restricts you to install your package on this machine. I will recommend you to try installing it with Administrative priviliges. Try also installing it on Win2K machine.
Also, try installing any commercially available MSI package (like Acrobat Reader) and see if it does install on your machine.
If the problem persists then please contact our
support and they will help you debug it.
Ali Hashmi