Friend, I have some suggestions. It can not be this, but it never hurts to take a look.
If you have only one "named cal", make sure someone else by mistake maybe she is not renting too! A "named cal" lets rent license to only one machine at a time every 30 days, but does not allow more than one at the same time. Also make sure it is being used to access applications in AccessPoint!
Stive - Brasil