Hi, I have exactly same problem :(
My log:
----- C&C:Online Launcher Start -----
Game: C&C3
C&C3 Install Path: C:\Program Files (x86)\Electronic Arts\Command & Conquer 3\
Started game with: "CNC3.exe "
Caught CREATE_PROCESS_DEBUG_EVENT from C&C3. Detaching...
Found game.dat process. PID 7912
*** Starting CA public key patching routine ***
CA public key is expected value.
Successfully patched CA public key.
*** Starting hostname hooking routine ***
Injecting DLL into game.dat process...
Result of injection: Code -1073741582