Carrara is a funny program which is why I dropped it all together. The only way that I even got an export to go into the modelling room was to import it as an .obj file. Use the import as a vertex primative. (Not the facet option) and use first names as ID. I cannot remember the other settings as I have not touched the program in months. Also, another way I did it was to use a .3ds file, and I promoted it to master and then switched to the modeller room and it was there. Carrara is too frustrated to be effective as it is incomplete.