Unless this is a CD your burned using packet writing software (i.e. formatting it, and using it like a floppy), in which case you'll need special reader software, which is a big reason why you should avoid such programs. They also wear out discs faster, so they're not so good for backups either.
More details about this CD that won't work are going to be necessary if the above isn't the situation.
Is there a way to run a Windows 98 CD-ROM in an XP operating system? Or is there a way to extract the data from a Windows 98 CD-ROM and use it differently on XP? Or is there a Win 98 emulator that I can buy or download to use this CD-ROM?
Thank you very much.