why am i loosing these carp when fishing?

[cowey]

right I'm getting realy frustrated all i seem to do is loose big fish at the moment I'm doing most things right and i have experimented with different ways of bringing them in like holding the rod at an angle or under the water slightly. i mean I'm even loosing them on the pole which shouldn't happen when the elastic is cushioning the fish fighting

the only thing i can think is that I'm using barbles hooks which have a habit of coming out