Magic Jack no longer works after loading 360

After updating to Norton 360 5.0 my magic jack plugged into that computer no longer works, or even loads up for thaat mater.  All I get is a message from 360 that the magic jack loader is incompatible.  I have the same set up on another computer I just updated to 360 5.0 and that magic jack still works.  How to I get around the situation??

After updating to Norton 360 5.0 my magic jack plugged into that computer no longer works, or even loads up for thaat mater.  All I get is a message from 360 that the magic jack loader is incompatible.  I have the same set up on another computer I just updated to 360 5.0 and that magic jack still works.  How to I get around the situation??