why wont my BMW 525i start after i ran out of gas

What is your question?

i ran out of gas in my BMW 1991 525i i put gas in it and it still won't start it just turns and sounds like it wants to but it wont it just passed smog less then a week ago and c.h.p expection. and runs really good as well great on gas. since i ran out of gas it wont start