😳 Self Trade Packet Number

I've been trying to duplicate scrolls in a 0.83 version new private server using Kit Train,
i entered the packet number for self trade which is 7B 00 00 03 00 and it doesn't work(blocked?)
does someone has alternative number or a better way for duping?

Mind to share the Kit Train?
I use another and it just crashes the client when I inject the dll.