Biogen Scientist interview questions

It was the first round of interview. The HR personnel didn't provide a specific time to call, rather he gave a 2 hour window when he will call. Then he called me after 2.5 hours. It tells about the professionalism of the company I guess. Then the interview went well. The HR acted as if he could hire me on the spot if he could. Keeping me on the phone, he was looking for a date for the 2nd interview. Then he said he will let me know the time by the end of the day for the next interview. And that was it. No more emails or communication from him. I emailed 2/3 times in following weeks, but didn't get a ingle response. This tells so much about the company.