minimize backpack problem

[nuluki]

im trying to call

Self.OpenMainBackpack(true):OpenChildren({Item.Get ID(RuneBP), true},{Item.GetID(LootBP), true},{Item.GetID(StackBP), true}, {Item.GetID(GoldBP), true})

but backpack are not minimalizing .

help

[nuluki]

any idea ? someone will help me ?