Quest Issue: Curscale Armor Quest, bag not combining

[Twelveguage]

the quest Curscale Armor Quest out of cabilis where you take the bag given by the merchant and combine 8 curscales into is not working for me. When i try to combine the skins, i get the message "You are unable to combine items in a bag of this type"

here is a link to the quest from the proj99 wiki

http://wiki.project1999.org/Curscale_Armor_Quest

i've tried multiple times with different skins, even sold my skins to the merchant, re-bought them and tried to combine, but nothing worked. also logged out and back in, nothing.