Need Advise I started this life style change Jan 2, 2008. I am exercising at least 30 min a day to Richard?

Simmons Tapes sometimes 60 min and I drink at least 5 (24 ounce ) Bottles of water only and I have a protien shake in the Am whey powder and I am doing atkins no bread sugar or sweets chicken for dinner and a vegtable Salad and chhese for lunch. I am 330 when I started I want to weigh myself once a month I am 5'9 I want to be between 155-165 How long would you say this will Take to reach my goal! thanks so much for helping! Sarah Any help would be great!!!