Tooltip in gump not working

[sahisahi]

I have tried this:
https://www.servuo.com/tutorials/gumps-tooltips-and-item-properties.19/

My expansion is set to AOS

CurrentExpansion.cs

using System;
using Server.Network;
namespace Server
{
public class CurrentExpansion
{
private static readonly Expansion Expansion = Expansion.AOS;
public static void Configure()
{
Core.Expansion = Expansion;
bool Enabled = Core.AOS;
Mobile.InsuranceEnabled = Enabled;
ObjectPropertyList.Enabled = Enabled;
PacketHandlers.SingleClickProps = true;
Mobile.VisibleDamageType = Enabled ? VisibleDamageType.Related : VisibleDamageType.None;
Mobile.GuildClickMessage = !Enabled;
Mobile.AsciiClickMessage = !Enabled;
if ( Enabled )
{
AOS.DisableStatInfluences();
if ( ObjectPropertyList.Enabled )
PacketHandlers.SingleClickProps = true; // single click for everything is overriden to check object property list
}
}
}
}

The heritage gump doesnt show tooltip onhover either.

what im missing? thanks