com. oreilly. servlet. MultipartRequest error

[Mini Pilla]

Hi,
I am using this package to upload a file(xml) from JSP.I am having 2 problems:
a)It gives me error saying that XML file should be valid..begin tag and end tag should match,though my file seems to b fine.
b)if at all it passes this line,
MultipartRequest mr = new MultipartRequest( request,uploadDirectory,10*1024*1024);
my page hangs up...
ANy clue will be appreciated...
Thanx
Rajani