Web Service sending error "The data at the root level is invalid"

[=?Utf-8?B?am1ncm8=?=]

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
deployed it to our server, created a project using 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?

[John Saunders [MVP]]

"jmgro" <jm***@discussions.microsoft.comwrote in message
news:EC**********************************@microsof t.com...

Please don't cross post. I answered this in the other newsgroup.
--
John Saunders [MVP]