ZNF Framework Setup Not Run.

[djalma]

I am trying to install the ZNF modules in my server but in the file Translation.php
happens a error , to refer at following variables :
Code: ( php )
$translationDefaultXpath = new DOMXPath($translationDefaultXml);
$translationDefaultXpath->registerNamespace('tra','http://www.zeronotice.org/ZNF/znf-translation');

The server returns following warning :
"PHP Warning: DOMDocument::schemaValidate()[<a href='function.DOMDocument-schemaValidate'>function.DOMDocument-schemaValidate</a>]: Element '{http://znf.zeronotice.com/ZNF/znf-translation}znf-translation': Missing child element(s). Expected is ( {http://znf.zeronotice.com/ZNF/znf-translation}item ). in /path/to/Translation.php on line 100 ".

Please, if you can to give me an idea what's happen.