Need Help with Alpari MT4 ordering

Hello;
I am a newbie on Trading,
I want to learn Forex Binary Option Trading, but stuck in placing my first order on a Free Demo account.

I have a new Alpari Demo Account,
Downloaded the MT4 from their site, installed it, and opened it using my Id and password,
loaded the pair currency chart I wanted to trade, everything seems OK,

Tried to buy a call Digital Binary option by clicking on "new Order" button on top menu,
but when the small window opens to order, I see other information like Buy limit, Stop limit, I want to order Digital Binary option, it suppose to show 1min, 2 min, 30 min, etc. expiry option to choose, not Stop limit, Buy limit,
is there anything I have done wrong here?

Hopefully someone from Alpari or anyone know about placing order of Digital Binary option on MT4 can help,
I am not sure if this a software issue, setting, or missing a plugin or what.

Thank you for your help

Need Help with Alpari MT4 ordering