I am an f1 student came to usa in aug2005. I have done 3 semesters of course work until which everything was going fine. Last dec 2006 i registered for my spring2007 courses and went to india on dec 26,2006. My school spring semester started on Jan 20th. But due to some medical problems i had to post pone my arrival to USA until feb 9th 2007.By the time i came to usa i missed 3 weeks of classes and my university dropped me out of all the courses stating the reason "Non-Attendance". I tried to contact the professors and re register for the courses. The professors are willing to enroll me back but i need my advisor to sign the form to enroll me back in the course which he is not willing to do.I have also got a doctor certificate pertaining to my illness from India.And the worst part is that my school staff are not at all helpful.So as of now i havent registered for any courses.What can i do now?Please advise