Cannot access the trunk area

The central locking system appears to be locked down. Can access the front door with the key, but the key fob does not unlock anything (batteries are good). I cannot access the trunk with the key fob or the key. I recently replaced (few months ago) the central locking module in the trunk due to water getting into the trunk area and was working fine. I may be having an issue with the module again, however I have no idea how to get into the trunk. Tried putting in the trunk key and turning it left and pushing, that did not work. Any recommendations?