Spellcast For Trueflight + Korin Obi

How do I write a rule having korin obi be equipped if the day/weather is light/lightsday when using Trueflight? I tried to modify my blm rule, but it's not working ;o

<if Advanced='("%WeaponskillElement" = "%WeatherElement" OR "%WeaponskillElement" = "%DayElement")'>
<if Element="Light"><action type="equip" when="precast"><waist lock="yes">Korin Obi</waist></action></if>
</if>

not sure if there's a thing as %weaponskillelement.

<if Advanced='"%SpellElement" = "%WeatherElement" OR "%SpellElement" = "%DayElement"'>
remove the ()

Also : remove the <equip> line because it's redundant with <waist>

i just copied the working thing from my blm version!

Ty!