Hello,
As you probably know, since Delphi 2009 we has different implementation of Type Library editor (works via RIDL). Pity, but it may work incorrectly with older Type Libraries. Result of that is impossiblity install package in Delphi IDE as it clears ZCube_TLB.pas
To avoid that proble, try to use command line call "tlibimp -P -Ha- -Hs0- -Hr- -Ps+ -Pt+ -i zCube.dll"
It will re-create zCube-TLB set of files.