[help] no monster no npc

[help] no monster no npc
i use MaNGOS_5926_ScriptDev2_412

Then you not install or not correctly install DB. Default DB in mangos not include any NPC/monsters data. It's just minimal working DB for mangos that setup DB structure and some internal data. For real world data you can use for example DB from http://www.udbforums.org/