Hi,
What error is Jabberwocky giving specifically? I assume you installed MUI via its install script?
Do the GENESiS/GENESiSPrefs/GENESiSWizard programs all work without complaints?
If they do it might be just a case of the MCC files required by Jabberwocky are not installed. Check the Jabberwocky docs and install the MCC files it needs and try it again.