This is a guide on how to complete the lvl 100 jobchange if it's not bugged on this server.In all private servers lvl 100 jobchange is bugged...Just in case it's working here, these are the steps to completing it.
1# Visit Alberstol Ruins and locate one of five Guardian Stones: Fire Stone, then Wind, then Tree, then Earth and then Water.
2# Talk to the Town Chief in AR.
3# Talk to the Blacksmith in AR.
4# Talk to the Skill Master in AR.
5# Talk to the Item Merchant in AR.
6# Talk to the Town Chief in AR twice.
7# Talk to the Town Chief in Roumen.
8# Talk to Lord Elbama in Elderine.
9# Talk to the Town Chief in Uruga.
10# Talk to Dark Elf in Forest of Mist.
11# Talk to Kid Woz in Elderine.
12# Talk to Town Chief in AR twice.
13# Talk to Fire Stone, then Water, then Earth, and then Tree.
14# Talk to the Town Chief in AR and then choose your class. You will get a green server message for everyone to see your achievement.
15#Finally, go to the NPCs in all towns and accept the rewards. They range from things like T5 scrolls, potions, etc.