sanırım xml'e kod eklemen lazım yüklemeye calıstıgın xml desteklemiyor en üstte bu kod olması lazım note pad ile açıp eklersen olur bence..
Alıntı
<?xml version="1.0" encoding="UTF-8"?>
<!--
This is a WordPress eXtended RSS file generated by WordPress as an export of
your blog. It contains information about your blog's posts, comments, and
categories. You may use this file to transfer that content from one site to
another. This file is not intended to serve as a complete backup of your
blog.
To import this information into a WordPress blog follow these steps:
1. Log into that blog as an administrator.
2. Go to Manage > Import in the blog's admin.
3. Choose "WordPress" from the list of importers.
4. Upload this file using the form provided on that page.
5. You will first be asked to map the authors in this export file to users
on the blog. For each author, you may choose to map an existing user on
the blog or to create a new user.
6. WordPress will then import each of the posts, comments, and categories
contained in this file onto your blog.
-->
<!-- generator="wordpress/2.2.1" created="2008-02-12 01:46"-->
<rss version="2.0"
xmlns:content="http://purl.org/rss/1.0/modules/content/"
xmlns:wfw="http://wellformedweb.org/CommentAPI/"
xmlns:dc="http://purl.org/dc/elements/1.1/"
xmlns:wp="http://wordpress.org/export/1.0/"
>
