DataGrid textbox question

[MrNorth]

Im getting a strange error on this line

<asp:TemplateColumn HeaderText="Beskrivning">
<ItemTemplate>
<asp:TextBox id="TextBox4" runat="server" TextMode="MultiLine" Rows="2" Text='<%# DataBinder.Eval(Container.DataItem("beskrivning")) %>'>
</asp:TextBox></ItemTemplate>

It says:

"BC30516: Overload resolution failed because no accessible 'Eval' accepts this number of arguments."

Im just binding by dataset to the gridna dn fetching data to the textbox using the databind expression... I see no reason why it shouldn't work

kind regards
Henrik