Many people are having issues with Magicjack Plus plugged directly into the router. When your magicjack plus is not working without the computer, you would natrually seek MagicJack's support... Although always available, they are not very tech-savy and it usually requires hours of your time. After 2 hours and giving up on them, I decided to attack the problem myself.
Here is how I solved my connectivity issues (error 42). I hope this helps anyone else having this problem or other connection problems.