2006 Nissan Altima - Key Fobs Not Working

All,

I have a 2006 Nissan Altima and both of my key fobs stopped working. I am not able to unlock the car or pop the trunk. I changed the battery in both but, that did not seem to fix the problem.

I read briefly somewhere that there are fuses associated with that mechanical piece. I would assume I just need to purchase a couple of new fuses and replace them if they are bad. Is this true?