There were known stability issues with licensing in earlier versions of Mojo, including the error that you received when trying to connect to the Knowledge _base_ server.
These issues have been addressed in the latest version of Mojo, as well as other stability issues. Other features have been added to the latest version of Mojo.
Our recommendation is to uninstall your current install of Mojo, and install the latest and greatest Mojo, which you can get at the Openmake Software website:
http://www.openmakesoftware.com/no-reg-%11-mojo-download/Thanks,
Layne