Standing too far forward after take-off

Hi,
First of all, I am surfing a 6ยด0 shortboard.But every time i pop up i am too far forward, so my back foot is just in front of the traction pad. Because of that I can not really get more critical. The thing is, if i take my fins out and practice on land, I do a perfect pop up with the perfect feet positioning. But as soon as i get in the water the problem is there again.
Hope for your advice!
First of all, I am surfing a 6ยด0 shortboard.But every time i pop up i am too far forward, so my back foot is just in front of the traction pad. Because of that I can not really get more critical. The thing is, if i take my fins out and practice on land, I do a perfect pop up with the perfect feet positioning. But as soon as i get in the water the problem is there again.
Hope for your advice!
