What is wrong with my ollie?

I used to be able to Ollie OK but after not skating for a year my ollies weird. When I Ollie, my toes are at the opposite tip of the board, with one foot at the tip of the tail and one at the middle or so. It seems that when i slide my foot up, my board levels out but the nose goes behind me a few inches so im landing on my heel. What am i doing wrong?