CAML query reporting services

I am using reporting service to query (with CAML) a list on SharePoint.

The list has an external content type, my problem is that just the Date field is not render fine.

This is my result:

'#Error

The field is render fine on SharePoint. (I can see the date value).

My query is really simple, no where condition

<RSSharePointList xmlns:xsi="http://ift.tt/ra1lAU" xmlns:xsd="http://ift.tt/tphNwY">
  <ListName>my list</ListName>
  <ViewFields>
    <FieldRef Name="Title" />
    <FieldRef Name="Order_date" />
  </ViewFields>
</RSSharePointList>