Focusing on subject!

[Fotografer]

I took a few shots of my Daughter on a swing at the park, in all the pictures my focus always went to the bar and not her. is there a way to keep the focus on her swinging and not the bars of the swing?</p>
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<p><img src="http://i849.photobucket.com/albums/ab53/ricjoe/IMG_0590copy.jpg" border="0" alt="" /></p>
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