sfmanga,
I also use Blender, and have run into this same problem most of the time, when trying to display a .x model in DBC. This has hendered me, up until now, from "going through" with so many projects in the past.
However, on my last experimentations to figure out the cause of the problem, I came to a few questionable results. The model I experimented with last, was a combination of a few objects, converted to .x format as one whole object. Only some of the objects appeared on screen(see image below). But, with experimentation, by messing with the individual names of the objects from within Blender, I found that more of the objects visually loaded into DBC. However, not all of them.
Click on image for full view
Note:The image above only shows the head and torso object, when a full body should appear, instead. Also, the hip is rotated at a 90o angle, as compared to its rotation in Blender. This has to do with repositioning and rotating the objects from within Blender. However, I am not sure if it is due from the actions being done in Object or Edit mode.
Therefore, I pinpointed that the problem lay either in the length of the names of the objects, or the specific characters within the names. But, I am not sure. These experimentations gave me a path to follow, but with not full results or solid explaination as to why.
Maybe, you and I can figure this out together, by experimentation, and passing information of any results back and forth. Blender is a great tool, and I truly wish to configure its problem.

+NanoBrain+