Sorry, here is my HTML file contents which i used to invoke the service
<html>
<head>
<title>Sample File Upload Form</title>
</head>
<body>
<h1>Sample File Upload Form</h1>
<form method=‘POST’ enctype=‘multipart/form-data’ action=‘http://tgqapp1.internal.gxs.com:5555/invoke/demo/trythis’>
File to upload: <input type=file name=document>
<br>
<input type=submit value=Press> to upload the file!
</form>
</body>
</html>