100 minute CDs

why will a 100 minute CD burn OK using NERO, but the last track does not play ? 2 I have wasted !!

Which ATIP, manufacturer and label do the discs have? Which burner do you use and which device do you use to play it?
100 minute CDs are not a standard, the standard only allows CDs with up to 80 minutes. So not each and every device may work with them.
90 minute (89:57, actually) CDs are more compatible than 99 minute CDs though.

Perfectly well said.