Exporting all textures

I play a game, Farming Simulator 2011 which uses i3d files.

We have a plug-in from the manufacturer that exports Blender files as i3d’s.

I have a model with three textures applied to one material. The mod looks great in Blender!
But when I open the i3d there is only one texture that has been exported. The file which is exported is the texture I had highlighted in Blender when I hit EXPORT.

I have a normal, AO and texture PNG applied to one material on my model. The i3d looks good, the uv’s are mapped correctly and all. Is there something special to do to get Blender to export all three maps in the i3d?