i never got any themes, i think maybe thats why it wasnt working :S
i'll check about for a theme i can test with, no them probably means cxmb has nothing to load, so a black screen.
i shoulda read more :/
EDIT:
got it working, i forgot the themes :S
its a bit annoying that only some are compatible with 5.5 but oh well.
ive got somewhere close to 20 so i should be good.