[Plugin: NextGEN Gallery] Problem posting images

Hello, I’m a web http://www.grupogaris.es, when I have a post and put some photos from NextGen Gallery the photos not show correctly, the code html show this ‘class=”ngg-singlepic ngg-none” ‘. How can I delete this code for post photos correctly.
An example: http://grupogaris.es/?p=76

Thanks and sorry for my bad english.