Sonic Generations Test Level Geometry Import Problem Thread

Hi, I just created a test level for Sonic Generations that I am trying to import the geometry into Sonic GLvl, it is a simple circular area, with grass painted on top and a brick texture on the bottom and sides, when I try to import the geometry into the Sonic Generations editor, I am greeted by a message saying something about conflicting textures, here is some screenshots of what I'm trying to import