I try but do not work this function

depotdeposit_ib()

I need help to use this, I want move item from backpack to container on ground, and the function moveitems don't work, in iBot the function depotdeposit work to do this, I've convert in windbot and appear this function depotdeposit_ib() but without success to do work.

I've try this function:

Code:
auto(1000)
if $cap < 100 and windowcount('parcel') then
depotdeposit_ib('parcel', 'fish')
wait(1000)
end