Hi chris,
I haven't touched pcars since the early beta of assetto corsa
... (oh do I love the downshift sound of the 599xx evo
)
Regarding your question: wmd is updating the shared memory very often but I have searched on their forum and they are still on version 5. So it should work with the current plugin!
Please scroll up on this page and search the post of sirnoname with the sharedmem v5. Download this and replaced the extracted file with the file in your xsim installation folder (plugins)... just overwrite it.
Atm I think you used plugin is outdated and this method writen above should give you back your motion.
Please report back if it works or not (here in this forum). Merry christmas - I hope santa got some motion for you