after finish the quest i got D/C and login back to the game and there are no more quest, ddo i need to lvl up to do next quest or its a bug quest?
Some quests from RTD questline are level dependent. They will show up once you have reached a certain character level. The earliest a character can get 2nd role is around mid-GB levels.
New RTD quest might not show up if you do not meet the criteria. Need to level up a bit more since certain RTD quest needs you to reach a certain level. All RTD quests should have no problems showing up by high GB levels. Too many active and unfinished quests may also stop additional quests such as those from RTD from showing up. Try completing those or give them up as a fix.