Data preload error: Merchant Referrer URL is invalid

Hello,

I am trying to implement hpp data preload. For some reason I had to include charge_total in the response, otherwise I get an error saying that the amount is 0. My response form looks as below:

<form id="form1" runat="server" title="Donate Online" method="POST" action="https://esqa.moneris.com/HPPDP/index.php" >

 <!--temporarily commenting out hpp_preload to see validation errors-->

<!--<asp:HiddenField ID="hpp_preload" runat="server" Value="" />-->

<asp:HiddenField ID="charge_total" runat="server" Value="20.00" />

<asp:HiddenField ID="hpp_id" runat="server" Value="" />

<asp:HiddenField ID="ticket" runat="server" Value="" />

<asp:Button ID="submit" runat="server"   OnClick ="submit_Click" Text="Continue to secure payment page." Visible="true" />

</form>

 

The interac validation form displays an error: https://esqa.moneris.com/ Merchant Referer URL is invalid.

I can't figure out how to resolve it. I tried to add this URL into the security section of the store but it did not make any difference.

 

Thank you,

Teresa