It looks like you are trying to install on Windows 2003 server right now. When we had talked you had mentioned that you were going to be installing on Windows 2k8. The installer that is available right now doesn't work on 2k3. We're working on fixes for this right now.
You can either give it a shot on 2k8, or I will update this question once we push an installer that works on 2k3. Sorry about that!
We've updated the installer, and it should work on Windows 2003 server now. Go ahead and give it a shot.