I have a customer who is using Wonderware version 9.0. They have the application on multiple computers in their plant. There is one computer that won't show the trends that are on the screens. Instead of showing the trend it just shows a black box. If you click on the black box it will bring up the configuration for the trend. I don't know a whole lot about wonderware, so I'm wondering what this computer is missing that will let the trends show up when the application is running.