Staking

Just a quick question, I am sure the answer has been posted before.
I have a method that picks two horses in a race and finds the winner in those races approx. 43-45% of the time.

The average dividend is not quite enough to produce a level stakes profit. Approx. 3-4% loss on turnover.

Does this mean that no staking plan around will be able to turn that into a profit, generally speaking.

I just thought I would ask before I started looking.

All suggestions greatfully accepted.