My gWax scenery is acting funny . . .

I have recently been trying to create a bit of scenery for FS using gMax, but to no avail. Every time I fly over, all I can see is the shadow cast by the object. When I enter slew mode, however, the object becomes visible and stays that way. Pause doesn't do it, just slew.
I at first thought it had something to do with the model itself, but I created a model just the way the gMax SDK scenery tutorial told me to, and it just did the same thing.
So I thought it might have something to do with the converters. I use MDLCommander and Middleman in conjunction with MakeMDL. So I removed the extra two programs and reverted back to the original type. Unfortunately this didn't do anything for it.
Then I noticed something about the scenery tutorials instructions for converting.
First off, I don't have an option to save as "Flightsim Scenery Object (*.MDL)". I have:
Flightsim BGL File (*.BGL)
Flightsim MDL File (*.MDL)
plasma (*.P3D)
Secondly, I tried saving under all three of those formats. I never got an XML file, I just got an X File, two ASM files and the BGL or MDL. What gives? Is this the problem?
Has ANYONE got ANY advice in ANY form?
I at first thought it had something to do with the model itself, but I created a model just the way the gMax SDK scenery tutorial told me to, and it just did the same thing.
So I thought it might have something to do with the converters. I use MDLCommander and Middleman in conjunction with MakeMDL. So I removed the extra two programs and reverted back to the original type. Unfortunately this didn't do anything for it.
Then I noticed something about the scenery tutorials instructions for converting.
8. In the Select File to Export dialog box, make sure the Save as Type box is set to Flightsim Scenery Object (*.MDL).
(farther down the page)
11. This will export two files into your C:\Program Files\Microsoft Games\Flight Simulator 9\Addon Scenery\Scenery directory. One file is an .XML file and the other is a .MDL file. The .MDL file contains all of the model data. The .XML file contains all of the information needed to place that model in the Flightsim world.
First off, I don't have an option to save as "Flightsim Scenery Object (*.MDL)". I have:
Flightsim BGL File (*.BGL)
Flightsim MDL File (*.MDL)
plasma (*.P3D)
Secondly, I tried saving under all three of those formats. I never got an XML file, I just got an X File, two ASM files and the BGL or MDL. What gives? Is this the problem?
Has ANYONE got ANY advice in ANY form?