As Mike says, you need to provide more info. Meanwhile, all we can suggest for you is to reset software to default settings and preferences.
SCS KB article #2744: "Close the program. Now press CTRL+SHIFT while double-clicking on the program's icon (note: in All Programs, not on Taskbar) to launch it. You should see a window that asks "Do you want to reset all preferences to default values?" Place a checkmark next to "Delete all cached application data" and then click Yes.
For older products, continue to hold the CTRL & SHIFT keys until the program is fully up and loaded."