Having you qualification of MBA and now you want to move another field... honestly speaking, sir it is a great wonder for me why you want to switch to another field. IT field is good but is a labor job. If you have some sort of expertise, you would be given the work. IT has only the attraction especially for those who are not engaged in this field when you will come in this field very soon would be frustrated.
So my advise is that you should not leave your own field as you have MBA degree and try to seek the job in that field in which you have taken the graduation. The computer field is good if you are young and energetic but when you will come in 50s your eye sight will go down and many new things as come in the market will not be able to cover them. So it is my suggestion do not leave your own field it is really a great degree.