I can't export my model using hottbj… it says it has a problem with "vertMatIndex"… I've attached my blend file here… please help
bump… XD 
anyway, I've no problems anymore in using Hottbj… since I've shifted to OgreXML Meshes… Now the problem is… I'm able to read through XML Meshes that only has a little file size… but when it comes to 6MB and above XML files… the application crashes with an exception telling about the java heap:OutOfMemoryException…
Anyway, the size of my XML was only that BIG because I've already joined all of the meshes in blender… but when I tried not to join them into one mesh… the export resulted to a bunch of XMLs that has little file size but I do not know how to join them… I've attached all of the meshes here in a zip archive… please help…