How do I disable the "State Change" popup on workflow transition ?

Hey guys,

I want to hide the popup on state transition
so I came across the built in commands : BuiltinCommand_ChangeState and BuiltinCommand_ChangeStateAdmin

but I still see the popup.

Can someone please help me with that. Here's my code :

				// Hides "Change state of workflow"
		shellFrame.Commands.SetCommandState(
			BuiltinCommand_ChangeState, CommandLocation_All, CommandState_Hidden );
		// Hides "Change state of workflow" for administrator
		shellFrame.Commands.SetCommandState(
			BuiltinCommand_ChangeStateAdmin, CommandLocation_All, CommandState_Hidden );