See this thread:
I also second more weight, or playing more with what you have. Lately we have been running about 1850lbs to surf, ~350 under rear seat, 750 beside the dog house, 750 on rear seat and other 750.
Before we used to run the same setup but swap the 750 on the floor by the doghouse for a tube sack about half that size.
The positioning matters too, we tried to position the 750 behind the doghouse and 750 on the side of it and it was really washy with very little push.
Has anyone been able to freeride your boat and you can't, or can no one? If no one can. It's not you, it's the boat's setup, maybe a little to do with the board as well.