Analogue turntable (technics 1210) on line 450djm mixer

I have my two technics 1210 analoge turntables connected on my new djm 450 mixer. I would have thought it would work on the line entree too. But get no signal. I always thought line entree is more stable than connecting it on phone entree. So question: Is an analoge turntable only working on phono entree or is there something I do wrong...? Thanks!