Help: Night Elf Style Mineing

I'm encountering an error when trying to emulate the NightElf style of mining gold. I've made a custom unit, based off the Wisp, I've also copied the following skills:

Entangle Gold Mine
Entangled Gold Mine Ability
Gather (Wisp Gold and Lumber)
Load (Entangled Gold Mine)
Load Wisp

Let it be known that I changed the
Data - Allowed Unit Type
in the load Wisp ability to allow the type of my custom unit.

So heres what happens;
I can entangle the gold mine perfectly.
But when I tell my version of the wisp to gather gold, I get a message in yellow text ("a building is complete" style message, if that makes sense) saying:
"Unable to use: Entangled gold mine."


Anybody know what I'm doing wrong?
Thanks in advance.

Wrong forum. Moved to general development.

Double check that your new ability creates the right gold mine, that your tree of life has the new ability, that your custom gold mine has the new load ability etc. It's easy to forget one of these things in such a multi-ability system.

My bad, thanks for moving it for me.

Anyway, I eventually got it to work, still haven't gotten rid of that error message but the units still gather gold, so I don't mind.

For anybody else who is interested:
There is another ability that is not racially attributed to the Night Elfs
It's unload instant (I found it with the creep skills)
It's apparently very important too.