Exporting from Mshape

When i create a mesh in milkshape and export it to b3d and then load it into a program it says it only has 1 surface.
when I export to 3ds and x it says i have Zero! Now i have multiple groups in the file. So how can I export it with more then one surface???

Groups are irrelevant. You need to assign materials. Each material will be a surface.