I'm not sure if this is your problem, but I've had a similar experience if he file has external morphs.  If you have poser, click on "use external morphs", open the object(s), click off "use external morphs" and save a new copy, in poser, with a new name.  This forces poser to save the morphs in the object, rather than in a separate pmd file.

Open the new copy in Carrara and it should work.

This has worked for me where morphs were simply gone, or separate items didn't match up correctly.

Klebnor

Lotus 123 ~ S-Render ~ OS/2 WARP ~ IBM 8088 / 4.77 Mhz ~ Hercules Ultima graphics, Hitachi 10 MB HDD, 64K RAM, 12 in diagonal CRT Monitor (16 colors / 60 Hz refresh rate), 240 Watt PS, Dual 1.44 MB Floppies, 2 button mouse input device.  Beige horizontal case.  I don't display my unit.