AllianceBernstein GORM Associate interview questions

I'm a graduated international student. I have a valid visa to work in the US for certain period of time.I got a phone call from an HR Agency hired by AB, the lady called me showing interest in my resume. she sent me list of questions to answer (Mostly questions about my skills and educational background.) i got then a phone call the lasted 15 minutes, it went pretty well, i was on the verge of going to the downtown office to meet the hiring manager till the lady knew that i'm not american and that's when the whole experience ended silently.