I'm not quite sure what you mean by 9 gauge needles. Needles are numbered, but sometimes they're referred to by their actual mm size.
A 9 needle would be 5.5 mm and a size 5 needle would be 3.75 mm.
If you were using yarn that suited a size 5 needle, it would probably be too thin for a size 9. The fabric would be very loose. Try using at least a worsted weight yarn.