why cant i upgrade my gates and ballista any more
facebook, server 2, untamed lands ... i am trying to upgrade my gates and i have 4 at lvl 8... its says i cannot upgrade them, so i try to upgrade the ballista and it says i must first buy a gate to mount it on. the same happens when i try to upgrade the catapults. it says i need a tower to mount it on. when i have 12 of them at lvl 10.... and it shows i can only build walls when i have all my walls at lvl 10 already.