Does the texture load correctly when the CR2 is opened in Poser?

If so check the DS3  log file for errors pertaining to any actors in the CR2.

Quite often a morph or actor related error will cause DS to drop the texture loading section of the CR2 even though it loads in Poser.

As an example I have had a missing bracket after editing a CR2 cause this to happen.

Also check the CR2 in DS2 if possible to further determine if the error is general to DS or is only DS3 related.