2 things can be done in this case.
1> Either remove the terminal service
2> Uninstall the BE and install it again by putting the terminal service in install mode
If you installed a program before you added the Terminal Services role, the system was not "listening" to the registry writes of the installation and the registry entries were not written to the correct user registry keys. Therefore, you must reinstall the program in Install mode for the program work properly.
If you want to install BE or uninstall it do the following: