Hey Will, Guessing that your body weight would be over 70kgs, a 9m in 14 to 17 knots is a too small a kite to get you going.
You definately need to pump your kite up more, if you are unsure on how much to pump up your kite, flick the leading edge about a foot or so from the inlet valve and listen for a pinging sound and not a dull thud.
If you have anymore questions feel free to send me a PM.
Cheers Croc