Is LINQ2XML Descendants working in Windows Phone 8?

I'm working on Windows Phone 8 C#/XAML .NET 4.5 Application

I'm trying to select element with a given name from an XML i'm getting, but when i try using Descendants to select it, it returns empty collection/list/array of results.

It returns fine when no name is selected, but when i try to search with name, it returns empty.

I'm probably just dumb and making a stupid mistake. Do you see some/can you explain?

EXAMPLES:

myXMLString:

<root>
  <element>
    <thisOne xmlns="something">example</thisOne>
  <element>
  <others></others>
</root>

code:

XDocument xmlData = XDocument.Parse(myXMLString);
//is always null
var thisOne = xmlData.Root.Descendants("thisOne").FirstOrDefault();
//returns the flattened version of the tree in a list
var descendants = xmlData.Root.Descedants().ToList();