Hi Mike.
I've just made a new score as per your instructions, and i cant get the dynamics to work either...that is odd!..(they don't work at all! with or without changing the vel.XF settings) and something i must admit i haven't noticed yet, as ive been working on implimenting the synchron libraies (where they seem to work fine...but i'll go back over every stave to check as some are large) with exisiting scores and as such, havent written anything new with those libraries yet.
I think i remember seeing a thread that referenced issues with the Vel XF, that Andi seemed to resolve, so perhaps the answer lies there (im sorry mate, i cant find the link but its not that old) and when i find it i'll post a link for you here and have a go at sorting out my playback config, but I must admit, that i like the VI Pro versions so much (they work so well with Mirx and if im honest, i prefere the sound of them too!) that ive only just recently started to work with the synchron versions (although i've had them almost since launch)
I'll post back here mate once i've had a chance to play about with it a bit more.
Kindest Regards
Paul