Chekquest at exact time not working

[Ichigo]

Hi.
I have noticed that quest quest that have a specific time to finish does not work ... they are reset instantly.
Does anyone know why it is?

For example:
15115,00:00,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,"Brides and Jays"

 

	switch(checkquest(15115,PLAYTIME)){
		case -1:
			classchange( 10035, "Jays#illusionfrozen", bc_self );
			classchange( 10036, "Brides#illusionfrozen", bc_self );
			break;
		case 0:
		case 1:
			classchange( HIDDEN_WARP_NPC, "Jays#illusionfrozen", bc_self );
			classchange( HIDDEN_WARP_NPC, "Brides#illusionfrozen", bc_self );
			break;
		case 2:
			erasequest 15115;
			set IllusionFrozen,0;
			classchange( 10035, "Jays#illusionfrozen", bc_self );
			classchange( 10036, "Brides#illusionfrozen", bc_self );
			break;
	}