custom soul link error Ninja/Gunslinger Talisman

[kalabasa]

im getting error's the skill would animated but no effect when used

GetSkillAttackRange

[string "buf"]:262: attempt to index field 'AttackRange'(a nil value)

im using itemscript

itemskill "SL_NINJA",5;

itemskill "SL_GUNNER",5;