iron-data-table: Databinding doesnt work

Hi
I think thats an easy one.

I have a json-object containing items with two attributes (name,state)

I try to bind this into iron-data-table

<template is="dom-bind" >
  <remote-data data-source="{{riskCombined}}" ></remote-data>
  <iron-data-table selection-enabled size="100000" data-source="[[riskCombined]]"  >
    <data-table-column name="First Name">
      <template>[[item.name]]</template>
    </data-table-column>
    <data-table-column name="Last Name">
      <template>[[item.state]]</template>
    </data-table-column>
    <data-table-column name="Email">
      <template>test</template>
    </data-table-column>
  </iron-data-table>
</template>

Where am I going wrong?