Exporting DTS issue

HI to all,

I'm having a little problem when exporting my mesh to DTS and trying to see it in Showtool pro.

First of all, I'm using max 9 SP2. I have DoIt 0.9.0 and using to export the file "max2dtsExporter.dle"

I created my mesh, editable poly. I rigged it and everything (using doit). When I try to export it, it gave me an error:
"Assertion failed on skin object"

From one of the posts here in the forum that dated from 2007, It said that this happens because your mesh is editable poly and should be editable mesh. So I clicked on my mesh and selected editable mesh. It seemed to work. So I unmessDTS.exe my file and from there loaded it in showtool pro. Well I see the blue lines and yellow crosses but that's it.

So of course, I went back to max and took my original mesh and repeated all the steps but instead of clicking on editable poly, I clicked on editable mesh, rigged it and exported it (using doit 0.9.0 of course)
and I tried to export it but it still giving me this error and no matter what I do now, I always get this error.

What exactly am I doing wrong?

thanks for the help.