I found it did.i searced around in the system and found some files were hidden.When I could see them I ran the update and all is well.I never thought to look before.
having read this I do not think that my old Ds is suitable to do the update although I did use for an update ages ago .I think as i stupidly upgraded to 1.4.4 and have no access to another machine then I need a new card.Have i got that right?