Excellent advice from awest. In addition to that, kids will have their good days and bad just like us. There might be something bothering her so see if she will open up to you about it. However, don't take her disappointment as a failure in you. You know the truth is that our kids are lucky to have us as their parents because we try so hard and do so much for them.
What's more important is just being there for them in good times and especially bad so they may come to you and talk about their problems if they choose to.
You're a great dad- I wish I had half your energy levels.
Me: 35|WAW: 38|D: 6yo | http://tinyurl.com/2dxx7m6 Feb 2006, left, came back in two weeks Aug 2006, left again Apr 2007, filed for divorce Dec 2007, reunited Mar 2010, moved out, filed again