Siege--a problem

It's my turn right now--want to attack outer wall 2 from gate 2...although this is shown as a bordering territory it's not one of the options for me to attack in the dropdown--what's going on?
Conquer Club, a free online multiplayer variation of a popular world domination board game.
http://www.tools.conquerclub.com/forum/
http://www.tools.conquerclub.com/forum/viewtopic.php?f=6&t=19594
the liquidator wrote:It's my turn right now--want to attack outer wall 2 from gate 2...although this is shown as a bordering territory it's not one of the options for me to attack in the dropdown--what's going on?