Parsing XML From a Socket InputStream using Xerces 1.4.4

I'm trying to figure out the problem with using Xerces 1.4.4 to parse XML data that has been passed through a socket...  I have no idea whats going wrong.  Here's the code used:

InputStream in = socket.getInputStream();

InputStreamReader contentReader = new InputStreamReader(content);

InputSource inputsource;

DOMParser domparser = new DOMParser();
domparser.setIncludeIgnorableWhitespace(false);

inputsource = new InputSource(contentReader);

domparser.parse(inputsource);
//Process the DOM Here


The following code works if I manually take the data from the InputStream and turn it to a String, then pass a StringReader over
to the DOMParser.

I also tried using a FileInputStream (to experiment reading from an XML File) instead of using a Socket InputStream by
replacing:

"InputStream in = socket.getInputStream();"

with

"FileInputStream in = new FileInputStream("testXML.xml");"

and the parser works...

So where could the problem possibly lie?

Thanks in advance!