XML : Getting the root element of xml file in linq

I am using linq. Here is my document structure:

      <t totalWord="2" creationDate="15.01.2016 02:33:37" ver="1">       <k kel_id="1000">      <kel>7</kel>      <kel_gs>0</kel_gs>      <kel_bs>0</kel_bs>      <km>Ron/INT-0014</km>      <kel_za>10.01.2016 02:28:05</kel_za>          <k_det kel_nit="12" kel_res="4" KelSID="1" >          <kel_ac>ac7</kel_ac>      </k_det>        </k>       <k kel_id="1001">      <kel>whitte down</kel>      <kel_gs>0</kel_gs>      <kel_bs>0</kel_bs>      <km>Ron/INT-0014</km>      <kel_za>15.01.2016 02:33:37</kel_za>          <k_det kel_nit="12" kel_res="4" KelSID="1">          <kel_ac>to gradually make something smaller by making it by taking parts away</kel_ac>          <kel_kc>cut down</kel_kc>          <kel_oc>The final key to success is to turn your interviewer into a champion: someone who is willing to go to bat for you when the hiring committee meets to whittle down the list.</kel_oc>          <kel_trac >adım adım parçalamak</kel_trac>      </k_det>        </k>  </t>    

This is a dictionary. t is root. k is word. When a new word arrives, totalword attribute and creationDate shall update accordingly. I have to get t node, get its attribute and save it. I have written the code above:

            XDocument xdoc = XDocument.Load(fileName);            XElement rootElement = xdoc.Root;            XElement kokNode = rotElement.Element("t");            XAttribute toplamSayi = okNode.Attribute("totalWord");    

kokNode comes null. How can I solve it? Thanks in advance.