i used to have the same problem on windows 7 64-bit but when i got windows 8 the works fine but it was very slow but i got CnCGraphicsPatch it helps and now the is fast
now the sidebar works , but still i can't do the multi engineer
Rulesmd.ini;
[General]
EngineerDamage=10%
EngineerAlwaysCaptureTech=true
EngineerDamageCursor.*= [uISettings]
AllowMultiEngineer=true
but still don't work