How to get rid of Error 401 on my Magic Jack?

Hello,
I keep getting error 401 on my Magic jack. I would powercycle and leave it off for a few minutes, then restart the MJ from the menu. It would work but after 1 call I would get it again. Is there a more permanent solution for this?
Magicjack error 401 is a pain for me and any explanation would be of great help
Thanks.
