3d models - Ingame problem

[STRIMIX]

Hello,

I made some 3d models for a project I'm working on.
I have a problem with it though, when i place the walls i made against each other then they get a weird black line in between and color diffrence.

Is there a way to fix this?

This is a screenshot of the problem: http://img856.imageshack.us/i/udk3dproblem.png/

[STRIMIX]

Ok i fixed it allready guys, the problem was in the texture and scale of the models, i scaled them in maya and now its all fixed!