spins

I have been trying a 3 for a while and can get the spin, but just cannot keep the wake...I come so close and have been able to paddle almost back in, but can't figure out what I am doing wrong. I watched a video from trickboardz site and it looked like the rider didn't even move back on the wake. Any tips on what to do? I know i am spinning fast enough because I tend to over spin into a 540 at times...If it helps i have been using a phase 5 prop lately. Thanks