I am trying to add a DnnDatePicker to my custom module but I get a "Error Creating Control" error (unknown server tag dnn:DnnDatePicker).

 <asp:Label ID="Label1" runat="server" CssClass="dnnFormLabel" AssociatedControlID="StartDatePicker" Text="Session date" />

    <div style="font-weight:bold" aria-haspopup="True" class="DatePickerText"></div>

    <dnn:DnnDatePicker runat="server" ID="StartDatePicker" /></div>

My import statements:

<%@ Register Assembly="DotNetNuke.Web" Namespace="DotNetNuke.Web.UI.WebControls" TagPrefix="dnn" %>

<%@ Register TagPrefix="dnn" TagName="Label" Src="~/controls/labelcontrol.ascx" %>

Any ideas?

Hi Cathal, 

if you mean the DotNetNuke.UI.WebControls or the System.Web.UI.WebControls then yes-both.