Ask specifically if they agree to take u as a graduate student if u give a GRE Test. That is very important. Don't go for transfer student in Bachelors degree...its a swamp. You basically have to show your potential to be a graduate student. One positive step u can do is to send them your copy of courses u have tken along with its course of study i.e syllabus...that will help them to understand that you have a good potential to be a grad student of MBA. Besides that you have to contact with professors individually for possible Teaching Assistant or Research Assistant openings.