I am having trouble installing ChemDraw 3.1 or less. When I choose ChemOffice in theinstaller dialog, type my registration code and serial number, I get a message telling me that these numbersare not correct.

I am having trouble installing ChemDraw 3.1 or less. When I choose ChemOffice in the installer dialog, type my registration code and serial number, I get a message telling me that these numbers are not correct.

In the installer, click only the selection that matches the software you purchased. If you only purchased ChemDraw, only click the ChemDraw selection.

Also, when installing you should be sure and turn you system extensions off. In System 7 you can do this by holding down the Shift key while restarting your computer. After installing, simply restart your computer to turn your extensions back on. If you are using System 6, you must drag the system extensions (referred to as INITS in System 6 terminology) out of your System folder and restart your computer. After installing your software, drag the files back to your System folder and restart your computer to turn them on.