Can't install Acrobat form cs6 diskete: I get this error: Exit Code: 6 - ARKSelector.dylib not found at /Library/Application Support/Adobe/DECor

How an I get around this error when I try to install Acrobat form CS-6 Design & Web Premium CD on my Mac air?

Exit Code: 6 - ARKSelector.dylib not found at /Library/Application Support/Adobe/DECor

HELP!