One way to tell if your latch is good is to check the shape of your nipple when it comes out of your baby's mouth at the end of a feeding. If the nipple looks creased or beveled (like a new lipstick), then the nipple is being pinched between the tongue and hard palate.
The nipple should look round, the same shape as when it went in. When in the baby's mouth, the nipple should be near the soft palate (you can feel this in your own mouth by sliding your tongue back). Try making sure your baby is VERY close to your body (think plastered to you), and lining up the nose with the nipple, so baby's lower jaw will take a good inch to inch and a half of areola.
See this site for a graphic:
If you just can't get the latch to be comfortable, consider seeing an IBCLC lactation consultant. Clicking is not a problem if mom is comfortable and baby is getting plenty of milk, but I am concerned that you are still experiencing sore nipples.
Lynnette Hafken, IBCLC