I created a web service in visual studio 2003, tested it with a sample.xml
file from a vendor we are using, and it worked exactly like it should.  I
depoloyed it to our server,  created a project calling the webservice with
the sample.xml file, and again it worked.  Now the vendor is calling the web
service from their application and receiving the following error, and stating
that there is something with the Web Service or the SOAP Client on my end
that is expecting the data differently then what it is :

?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<soap:Body>
<soap:Fault>
<faultcode>soap:Server</faultcode>
<faultstring>Server was unable to process request. --> The data at  the root
level is invalid. Line 1, position 1.</faultstring>
<detail />
</soap:Fault>
</soap:Body>
</soap:Envelope>

Any suggestions?