Unexpected Cdata error during property transfer

<Response xmlns="xxxx">
<token>
<production>
<access_token>xxxxxx</access_token>
</production>


I am trying to get the value of access_token .
Xpath i used is /Response[@xmlns="xxxx"]/token/production/access_token/text() and i get unexpected CData error

also I am trying to pass this to the request header of other request .

Appreciate any help