Aircraft lands in the middle of the runway

Hello,I face the following problem:When an AI aircraft performs a landing then it touches down the middle of the runway instead the first feets of it. As a result, it ends up straight out of the runway, turns back continue straight untill it reaches the end of the runway, taxiing/parking ok. The traffic works ok - despite this problem.This problem does not occur to all airports I have altered only at a few. I changed the approach speed/also different AI plane it didn't worked. Also increased the length of the runway didn't help also.Any idea?I use AFCAD and TTols