How to query from XML with SchemaVersion?

I have this XML file

<?xml version="1.0" encoding="us-ascii" ?> 
<LoanSetupFile SchemaVersion="3.0" NumberOfLoans="2" xmlns="http://ift.tt/1qqRTNn">
 <Loan ServicerLoanNumber="1"/>
 <Loan ServicerLoanNumber="2"/>
</LoanSetupFile>

I'm trying to get the ServicerLoanNumber attribute. I've tried a lot of ways, and this might be my closest attempt, but still it's returning null

var doc = XDocument.Load("fileName.xml");
XNamespace ns = doc.Root.GetDefaultNamespace(); //This gives me the correct namespace
var loans = from l in doc.Descendants(ns+"Loan") select new { ServicerLoanNumber = l.Attribute("ServicerLoanNumber").Value };

Does anyone know what's wrong with this? Do I need to include the SchemaVersion? If so, how?

Thanks a lot..