Forum:S&S Serpens problems willlowtree

I have made a Pearlecent S&S Serpens in willowtree, but the weapon does not appear in game.
 * dlc3_gd_customweapons.Pearlescent_Weapons.CustomWeap_SupportMG_SandSSerpens
 * gd_manufacturers.Manufacturers.SandSMunitions
 * gd_weap_support_machinegun.A_Weapon.WeaponType_support_machinegun
 * gd_weap_combat_rifle.Body.body5
 * gd_weap_combat_rifle.Grip.grip3
 * gd_weap_support_machinegun.mag.mag5
 * gd_weap_combat_rifle.Barrel.barrel5
 * gd_weap_support_machinegun.Sight.sight3
 * gd_weap_combat_rifle.Stock.stock5
 * None
 * dlc3_gd_weap_UniqueParts.SupportMachineGun.acc4_SandS_Serpens
 * dlc3_gd_weap_UniqueParts.SupportMachineGun.SandSSerpens_Material
 * gd_weap_support_machinegun.Prefix.Prefix_Kick1_Glorious
 * dlc3_gd_weap_UniqueParts.Title.TitleP_SandS_Serpens
 * 0   5   15

Everything i have checked says that the weapon is compatable. Help me with this problem.