PVT Labsystems interview questions

I don't remember applying to this company, but they said they received my resume as I had applied to them. Phone interview was just a casual talk, I was asked to come down to Georgia for interview process. They booked the flight, hotel stay and everything, they were friendly, Tatjana Sokac in particular. Its a German company, there was no interview as such, we casually talked. I was more given an information about the company than being asked any questions. I flew back and upon follow up I was told I was rejected, I am not sure what went wrong.....