I am attacking the castle of my second account, I have there more than 1M but my troops didn't loot..

Gold can only be raided by 1 legion. That is the class legion of the raider class player. If you are not a raider then you cannot take gold. And if you are then you can only take it when attacking with the 'class' legion.

If the player you are attacking is a farmer then they will have a protection level on resources and gold. If the gold level is below that then you cannot take it. All players may also have a protection amount from their alliance research level.

If you are still looking for help with this game we have more questions and answers for you to check.

Set the other account to Trader. Its best you're a Raider.. only class legion can loot gold. Increase research to get more gold. You also get more gold when you attack Traders rather than Farmers and other Raiders.