The creative world has been disabled from play1 and is no longer available. This is due to bad intent players.
On both servers a new fly system was added on time. Fly time can be obtained every day when you log on to the server (it is automatically given) or if you first enter the server. You also get time when you vote. To activate this type of fly, use the /tf or /tf help command for help.
The /fly command was removed from Titan ...