I have an Apex cloth sim setup and working well in Maya. I followed along with the Nvidia tutorials:
APEX Clothing Tutorial with Maya using a Trench Coat: http://www.youtube.com/watch?v=2tJSUOYHOSA
APEX Clothing Tutorial with Maya: Exporting to Unreal 3: http://www.youtube.com/watch?v=erM-wLDx-xw
The problem I have is a strange behavior where when I export my fbx the mesh that I applied the cloth sim to does not appear upon import into UDK. Then If I attempt to continue and plug the .apex component into the clothing assets part of the skeletal mesh the cloth part of the mesh does appear, but the rest of the skeletal mesh disappears. I feel like something has already gone wrong at this point because this is not what happens in the Nvida tutorial. Also when I export the Nvida trenchcoat sample myself that seems to work fine and the coat is immediately visible when I import it into UDK. If anyone has any ideas about what may be going wrong I would be happy to get your feedback/input. Thanks.
Here are my test maya scene and udk package of my exported assets: http://joshstoker.com/misc/apex_test.rar