Plateau (almost 9 months out)

Hi. I had my surgery (Lap RNY) on Dec. 3rd, 2002. I am just wondering if anyone else out there is having the same problem with plateaus that I am. Lately I have been going 3, maybe 4 weeks without losing, then I will drop 5 lbs. or so. Then that 5 will go back and forth for a week or two and then finally leave for good. I know the weight loss slows down the further out I go, but this is getting discouraging. I have lost 108# total so far, have about 40 more to go. I am beginning to wonder if I will actually be able to get this last 40 off. Please post if anyone has any advice. Thanks.