AMO OR GTT for Nifty & BankNifty ETFs

I did that, Place order around 8:50 AM, Chose AMO and ST with price and trigger price… and when clicked Sell , I got that message “AMOs are not allowed for ETFs. Please use GTT instead”

I am using kite Web version. So how do I place GTT order outside market hours on ETFs like : ICICINIFTY ?