Help my Scirpt

[erkali]

sub vendor()
principio:
wait(650)
UO.Findtype("0x14ef","0x0000","my")
UO.drop("1","0","0","0","finditem")
UO.Ignore('finditem')
wait (650)
UO.usefromground(0x14EF)
UO.Say("Vendor Cash")
wait (2000)
UO.Say("Vendor Redeed")
goto principio
end sub

always this error

invalid seria number
invalid object finitem
No item Found

only always :S and not drop to the -> 0x14ef

Help! Me!

[Edred]

UO.usefromground(0x14EF)

You need use quotes for type in this command:
UO.usefromground("0x14EF")