Help needed-Swordsman class mission fail

So after I went to Korin and got the Howling Sword mission from him, I disconnected and then I joined again and right-clicked on the sword and then the mission disappeared and now whenever I right-click on the sword it says I failed the mission even after I went to the swordsman in the Majin area and right-clicked on him and the sword it still said I failed the mission after right-clicking on the sword,and I don't even have the mission for the swordsman in the Majin area, and now I don't know what to do to get the mission again. Any ideas on how I can fix it or something please? I even went back to Korin to try to get the mission from him but nothing