Hi deano2uk,
Firstly, uninstall both.
Then download and install
WLM 2009 (beta) and
Msg Plus! Live (beta).
Where can I get Msg Plus! Live 4.79 (beta) for WLM 2009 (beta)?
They're both compatible with each other, so you should have no problems. Hopefully a re-install will fix the problem. Double check you're downloading the correct versions.