troubles with new payment plugin

Hi,

I am working on a new payment gateway for nopcommerce. It is IDEAL payment for the dutch ING bank. Within visual studio i get the following message

"For security reasons DTD is prohibited in this XML document. To enable DTD processing set the DtdProcessing property on XmlReaderSettings to Parse and pass the settings into XmlReader.Create method."


This could be solved by setting the property. That is  why i added the following code

   XmlReaderSettings settings = new XmlReaderSettings();
   settings.ProhibitDtd = false;
   XmlReader rdr = XmlReader.Create(strm);

    while (rdr.Read())
    {
    }


after cleaning the project, rebuild, reboot. Cleaning temporary folder of asp.net the message keeps existing.

anyone any idea how to solve this.

tnx. Marcel