Doh !! Some SameTime 7.5 services don't start ( problems with Windows Remote Desktop client )

http://www-10.lotus.com/ldd/stforum.nsf/ReleaseAllThreadedweb/34ebae8aa7ff5854852571930012af02?OpenDocument

Solution

Install Sametime having connected using the MS RDP client in console mode: -

mstsc /console

Thanks to Carl for that one :)