This problem is usually caused by a corrupt "Normal.dot”. To fix the problem, execute the following steps:
1. Close all Word windows.
2. Look for the file "Normal.dot" on your computer (usually located on hard drive C).
3. Rename this file to "Normal. dot OLD" (or delete it).
4. Re-install MetaTexis (you do not have to uninstall MetaTexis first)
5. Restart Word. (Word will create a new, clean Normal.dot.)