Thanks for your reply.
Can you please elaborate this:
It appears that you are attempting to read the data from a file on the local file system, not from the uploaded FileItem.
I don't really get it. I am sorry I am kinda slow on this. I have been struggling with this problem for 2 weeks now. And no matter how I read the API 's of FileItem or File, I still don't have an idea on how to solve this.
Thanks.
Darren