Scouting war targets (without) actualy scouting ^^

Pretty simple, Send a Scouting party first (if you wanna know how much resource he / she has)
If you decide he/she is worth attacking for the resource, and your scout report fails to yield the Defense units the castle has.

Send in a Common (disposable) hero along with 1 scout and attack the target.

You will surely see how many units he/she has defending and the most you loose is time and 1 scout

I used to scout non-player targets. The massage comes that thay have "won" but i do not recive any information at all. What do i do wrong?