Sounds like you are having an issue with NVdriver not loading up. What happens when you do:
If it is successful, try starting X again, if not, then you probably need to install a different driver. I had to compile mine from source to make it work. If you need help with that let me know.
Otherwise, check the documentation to make sure you have made the appropriate changes to your X-windows configuration file.
BTW, I am using the exact same board from MSI. Which distro are you using?