Disapointed in no fix reponce of my freepbx. Dropped registration of phone no reason!

I am even tempted to update but that really does not resolve the issue, with this board. I was hopping to get a good reliable answer as to why my freepbx dropped registrations about two weeks ago. I updated my posting with no replies. I cannot add any new extensions. It does not show in the registration drop down list on the right side of the window. Before I waste my time updating to a whole new free pbx, what could be the likely cause of this problem?