I've just spoken to a friend who has a 60D and a Di622 MkII and it seems that yours did have a fault with it. He put his on straight after inserting the batteries and after 1 test fire with the rear button he's been shooting away like mad with it. I'm going round to try it on my 7D tomorrow to see how it gets on with it but I don't expect any problems.
The Canon 430EX will be even better with your 60D though, I used a 580EX II with my 60D and it was more easily controllable than the Nissin Di866 which worked very well with it, but not as good as the Canon flash.