sitemap xml error ..

recently received this error (below) when submit/ping Yahoo .....
any one face same problem ???
i using this plugin : google xml Sitemaps by Arne Brachhold Errors, Warnings, Notices:

WP_DEBUG was set to false somewhere before. You might not see all debug information until you remove this declaration!
Result (text only):

The following errors were detected: backend fetch error 400 Result (HTML):

<?xml version="1.0" encoding="UTF-8"?> <Error xmlns="urn:yahoo:api"> The following errors were detected: <Message>backend fetch error 400</Message> </Error> <!-- ws01.ydn.gq1.yahoo.com uncompressed Tue Jun 29 15:47:02 PDT 2010 -->

Doesn't that plugin developer support his plugin?

It seems like you had a "backend fetch error" where a web page was not being served up. So the server timed out or was down at the time of the request.

Are are using WordPress 3.0? That is the only version that uses WP_DEBUG.

Are you using an old version of the plugin?

Yahoo requires an Application ID in order to ping them. Are you using a valid Application ID?

You might want to set WP_DEBUG to true in the wp-config.php file to see the rest of the messages.

If you can't resolve it, you should go to the WordPress forum for that plugin and see if anyone else is having the problem. if not, you can post the problem there.

not using 2.9.X
the plugin working well with other SE, yahoo fail only :)
is ok not that major issue.:)
thanks