Does anyone know what is the matter with my model

I use md5importer to import a md5 model into my game, but there is sth. wrong when it display, sth. mix up, could some guys help me to check it out ? many thanks~

suppose display it as right.JPG, but in fact it show as wrong.JPG, pls refer to the attachment.

I would guess the normals are flipped.

You could draw all faces double-sided to check this.

As I see you're using SimpleGame or DebugGameState, you don't need to code a hack to troubleshoot normal directions.  Hit "n" as your program runs, get close and see if the normals are pointing in the right directions.