MMD Arlia wip2

almost done, though i was forces to make ehr a pmx or she'd implode =S
now when i turn physics on in mmd mmd crashes OTL
help?
because.....that makes things really difficult......
annndd...idk how to fix it.....
OTL
But yeah, Arlia is almost done OTL
i need shoes and her skirt and I'm set.

but seriously, can anyone tell me how to fix the whole mmd crashing thing? ;A;