Loading XML

I am trying to load many XML files into SQL Server 2005 Standard Edition. Each XML file contains many individual XML items, each starting with: <?xml version="1.0" encoding="UTF-8"?> The files do not have a .xml extension. I do have a schema for the data. I can also get hold of a dtd file for the data.

Since I am new both to XML and to databases I have been trying to follow examples wherever I can find them. I have not found the right example or tutorial. The closest that I found was in Kirk Haselden's book (a very nice book to learn from, by the way). On page 73 he sets up an OLE DB Source. His example works fine. But when I try to use XML Source instead of OLE DB as the source, I cannot get it to work. A typical error that I get reads as follows:

"Error at Data Flow Task [XML Source [1]]: There was an error setting up the mapping. The 'http://www.w3.org/XML/1998/namespace:lang' attribute is not declared."

Evidently I am doing something wrong, but what? Can someone point me to an example of using SSIS to load many XML documents that I could use as a model?

Thanks.