whenever i try playing my custom zombies map, i get the error:  unknown item 'zombie_perk_bottle_doubletap'. how can i fix this?

anybody?

same error before it was working fine

you have _zombiemode_perk.gsc on your mods/modname/maps ?
if yes open it and remove the Precacheitem of all perks and the knuckle
then go to raw and copy the weapons file and paste it on your mods/modmane/          then go to ur launcher in mod builder search to zombie_perk_bottle_doubletap jugg etc... and clic on the square to active it then build the iwd & ff file and compile the map and its will work that what i did