Crystal connection issues with a dataset provided by a dll

Hello,
I'm consuming a web service with in a dll that has a public function that returns a dataset.
I'm trying to connect to it with Crystal Crystal reports. I'm pretty sure the "Double Hop" rule while passing my credentials is causing me grief even though I'm supplying a NetworkCredential. If I reference the dll in a test project it brings back the data, but when I try to connect to it with Crystal I get "logon failed  Details:mscorlib : Exception has been thrown by the target of an invocation.
Any ideas on how to get a around this would be appreciated.

Here is my class from within the dll:
public class cEntry
    {
        private EntryWrapper.entry.Service1  t = new EntryWrapper.entry.Service1();
        DataSet relational_data;

        public DataSet tickets()
        {
            string u = ConfigurationManager.AppSettings["user"];
            string p = ConfigurationManager.AppSettings["pass"];
            string d = ConfigurationManager.AppSettings["domain"];
            t.Credentials = new System.Net.NetworkCredential(u, p, d);//Send credentials
            string strWeb = t.ReportTest("F241A905-89B1-416d-8DC2-8C2EA1A6B434", ""); //Get xml string from Entry

            XmlDocument doc = new XmlDocument();
            string inputXml = strWeb;
            doc.LoadXml(inputXml);
           
            XslCompiledTransform xslTransform = new XslCompiledTransform(false);
            xslTransform.Load(XmlReader.Create(new StringReader(Resource.ticket))); //Load xlst string to the transform object
            StringBuilder result = new StringBuilder();
            XmlWriter output = XmlWriter.Create(result);
            xslTransform.Transform(doc, output); //Apply xlst to the xml file
            XmlTextReader xml_reader = new XmlTextReader(new StringReader(result.ToString())); //read the file and convet to xml

            relational_data = new DataSet();
         
            relational_data.ReadXml(xml_reader);
            return relational_data;
        }