Good-Till-Cancelled option does not appaer in "duration" section

[lelos2]

Hello
I have a problem with duration of my fixed prices listings.
I used 30 days fixed prices listings, but now i would like to use "Good-Till-Cancelled" option with large QTY of items.
So auction will stay for a lot longer than 30 days.

The problem is, that when i try to "relist" those items, or "sell similar" item in "duration" section of relisting i have only 3 , 5 , 7 , 10 and 30 days.
There is no "Good-Till-Cancelled" (please see picture).

It is also the same when i try to sell "new item"

What can be wrong ?

About my account:
- My account is "bronze" power seller (performance above standard)
- In Site preferences -> se the out-of-stock-option - is set to YES
- All my listings are 30 day, fixed price, multiple items

Can anyone help me out ? 🙂