February 2016
I have found the solution. The Problem is the wrong country-setting in the registry. I have had first installed the english version of "c&c ultimate collection". And after the german version.
The solutiion:
first install the COMMAND & CONQUER ULTIMATE COLLECTION LAUNCHERS
Version: 1.16
Author: Bibber
Then put the option "-ui" in the icon "Command and Conquer 3 Tiberium Wars and Kane's Wrath"
start the game and change your language from english to german.
Voila - the game starts !!!!!
February 2016
The launchers can be found here, btw:
http://bibber.eu/downloads/cnc-ultimate-collection-launchers/
August 2017
Einfacher mit der Regedit den C&C Schlüssel suchen english löschen und german16 eintragen fertig. Es läuft in >deutsch! viel spaß