I've installed the SU Podium V2 on a Macbook Pro but after the render finishes some unexpected lines and planes appear in the middle of my building (on the rendered scene). What do i have to do to make it disappear??? Please, can anybody help me??

Hi, i'm an architecture student and i have to finish my project in one week. I'm having problems with the render. I bought SU Podium V2 yesterday to my 7.1 Sketchup Pro (i've installed in a macbook pro but after the render finishes some unexpected things appear in the middle of my building.. Some lines and plans that shouldn't be appearing. I've tried to turn the shadow on/off and 3d models of trees as well, but the plans and lines continue to appear. Please, can anybody help me?!