Cannot switch another "Chart of depreciation" in transaction AO90.

Hi all,

i need to record batch input for AO90. When i first run transaction AO90 screen with input field for Chart of depreciation displayed and i can fill-choose my own value Chart of depreciation. But when i run this transaction second, ... i cannot insert another Chart of depreciation, i have filled Chart of depreciation with my first value. How can i switch my new Chart of depreciation?

thanks