what u do is this i assume your using gmax and dex script to export your model....after you export open up a new notepad and copy and pase all lines of code from the listener minus the blue text and the export successful text at the end of the listener. Then from your new notepad where you pasted all the code choose file save as and your gonna have to add in a .mdl at the end of whatever you name your file/you must do this cause it wont automatically save your file as an mdl if not. then open up yogbuls and load that new mdl file choose convert to mdx. this should work.