more nlffi troubles (of course)

I'm getting a LOT of errors like :

glutdemos.cm:2.11-2.30 Error: exported structure not defined:  
F_glutWMCloseFunc

I am assuming that the is because somehow I have the path wrong to  
the lib.

Unfortunately I think I have it right.

Is there any other possibility, like maybe I'm actually pointed at a  
static lib, or some other problem ?  Is there anyway to turn on some  
debugging which might shed more light on this ?

Thanks

Brian