Losing weight at snail's pace..:-(

It seems oh so easy - movie stars keep doing that all the time and Teleshopping folks keep showing those shapeless beings transforming into handsome men and women - but a 1.5 mile treadmill walk or a 2 mile cross-trainer trek burns only a 100 calories...that, and some diet control..and yet I have lost only 2 kilos in 11 days...:-(..drat, and double drat!