Leaky defence

I have been using malaga in my latest fm save. I have built a good squad and i am happy with my team. However i cannot stop conceding goals. One game i will win well then the next i will get hammered for no reason. I have no problem scoring but i concede at least 2 a game. I dont use an attacking style of play and i have 4 at the back with 2 defensive midfirlders.

Any advice would be much apreciated

what players do you have?

Demichelis and DIaz at CB. Toulalan and keita at DM

buy new CB , use Ignacio Camacho as DM and Toulalan as Anchorman