session.Init Fails, returns 1543

hi.

I’m trying to use the notes 8 sdk to write a little app, however i’m failing at the first hurdle.

When I call LNNotesSession::Init() it returns 1543 - which has no associated textual error message and so i have no idea why its failing!

I’m developing on winxp and have notes 8 client installed and i’m using visual c express.

TIA