Endpoint Error help

I have been working on creating an integration application in visual studio, using c#, which allows the user to input a flat .csv file containing multiple objects on each row and then have those objects parsed out and loaded into the individual CRM On Demand objects.  Portions of my code were from an older project where they were loading contacts via web services.  These older objects, when I make web service calls to them load just fine, and there are no problems.  The problems occur when I attempt to use service references in which I loaded the wsdl's myself.  The