Forum:Battlling other opponents

i would like to know why am not allowed to attack other people back. i have a person who has been attacking me for over a week straight.

When i go to attack him it say he is dead or to weak so i will wait 1 hr or 2 hr and try to attack him again and get the same he is to weak or dead but he should have hitpionts after that amount of time his wins and loses are the same. when i am on line playing and he is an i get to attack him i attack him below 10 hp then he goes off line for awhile and comes back on and attacks me when i am not play. when i play again it could be 1min or 1 or 2 hrs later after he has attacked me i get the samething he is to weak to be attack is this a flaw in the game why am i not allowed to attack him if anybody knows the answer why i would sure like to know robert