I am left wondering what I did wrong.
I tried to upgrade from version 5.5 to latest, the installation went well as it told me it was removing my original version.
It then informed me the serial No of my version (Which I knew anyway) and it said I would need this later.
As the final stage of installing vers 6 it asked me for the verification No and then decided that this was invalid and could not continue would I contact my service provider!!!
I decided to reinstall version 5.5