If you click on User CP, then Settings & Options, then Edit Options, there are options like "If you do not want to send or receive private messages, you may disable the private messaging system" it's a case of ticking a box so if it is unticked, you'd need to tick it but there are other options like only receiving messages from contacts etc. If it doesn't work after that then maybe it's faulty. I haven't had a message either for about 3 years
