Firstly, be sure you don't have the CD that's being asked for. Sometimes a program will ask for a CD by referring to it as a CD number, try the second or third disk in your set first even if it's called something else. You may be surprised.

If you definitely do not have the CD being asked for and you recently purchased the title, contact us at to obtain the missing CD. (See notes at the bottom before sending the further support team an email.)