Day to day weight fluctuations are normal, and part of everyday living. Your weight isn't a static number, more like a vital sign! Before you're concerned something is wrong, give your program 6-8 weeks for results to show up on the scale.
When you start exercising to lose weight, you often gain weight. This is because your muscles are retaining water to cope with the increased demand. This is normal, temporary, and why you should probably stop weighing every day for a little while. :)
Details here: www.sparkpeople.com/community/ask_the_expe