Well now those good times are over — at least for the time being. Perfect World announced this week that it is disabling the Arc quests system on the PC (the Xbox version remains online) in preparation for a new and improved version that should be coming some time in the near future.
Don’t fret that this is going to set you back; the company assures players that their progress is being saved and will be imported when the system comes back online.
Source: Perfect World