Can you please attach a SketchUp model and give us some more details on what is going on so we can help you better? Also, please answer the questions below:
Upload an image, perhaps of something you are trying to model or a screen shot of your model if you do not want to share your .skp file. This is better posting practice than just asking users to blindly download something from the internet.
Thanks for your help and understanding!
AlexB