One lesson you will learn while breeding chams: patience. You wait for males and females to show interest, wait for the eggs to be laid, wait FOREVER for babies to hatch, then wait for them to grow up.......
When initially trying to pair up different panthers have patience, show the female to the male and see if there is any reaction by either. After a few of these brief "viewing" periods, if the female isn't gaping and rocking and assuming your female is old enough, then introduce them. Leave them for a little while and observe, stay close enough to interfere if you sense any aggression. If they don't mate one day, wait a few days and try again. They will let you know when the time is right!