My H1b got approved from company A in Jan 2005. Before that I was on OPT. In may 2005 I applied for change of status to F1 and it got approved 10 days back. I have been going to school and maintaining my F1 status. Now I have a job offer from company B and I want to change back to H1b. Will there be any problems in changing status back to H1b since I have switched my status so many times ?