Use Bank instead of Username at IconomyChestshops

[ghost]

Its not possible to use the Bank accounts instead of the username at the Iconomy chestshop Plugin. It wont create Chestshop if I use bank:bankname on the sign at chestshops instead of username. Is there anything I can do? Maybe isnt it bank:bankename for the Chestshops?
Please help.

Chestshop is created by a chest with a sign. On the sign:

Username
Amount
Prince
Itemid