First wanted to thank you for your help, but I can not solve the problem.
As you say, the slideshow images fit the 609px width and high are scaled according to the width, but this happen inside of the page, in the index.php does not happen. Let me explain better, I have created a template for my index. This template is made with the "template builder". For my design, I need a slideshow and right floating the Twitter widget. Then from "Template builder" of Choices theme, I created two columns (66% and 33%), where the left column loads a "Single page" containing the slideshow. And the right column twitter widget.
The problem is that when I see the slideshow from the page it's ok. But when I see it from my index, created with the "template builder", the slideshow does not have the height that I need.
What did I do wrong? How I can fix it?
I pass a link to the screenshot of the index: http://www.designandweb.es/choices
And the link to the page where the slideshow is correct: http://www.designandweb.es/choices/choices.html
Devian thank you very much, I need your help!