how to add frost buff to Ice Spear with Smithbox?

I can't manage to add the frost buff to my weapon when using Ice Spear on smithbox.
on SPeffectParam, Ice Spear, I tried changing:
SP Effect type - Trigger on Info (1): 323
and
Cycle SD effect id: 826 (the one from freezing mist) but no luck so far..
I managed to add a weapon lightning buff to Thunderstrike changing these 2 values, just copying the effect id of Lightning Slash and it worked, but this one is more tricky..