Did you set it to the correct flag?Most WoD WMO have around 10 different flags to display different sets of doodads just try changing the doodads flags until you find the one you're looking for.
Use M2 version of that ship its much better
so big problem to create them ?
so export whole model from WMV as obj and convert it thru OBJtoM2 back to M2 ... collisions shall be fixed
And what exactly is not working will you tell us ?
And why are you adding meshes when you have already all of them in OBJ file when you export model and load it to Blender ... then just export it propetly and convert to M2