Metaweblog, writely and flock

Hi all!

I’ve been using WP since version 1.2 like a year and a half ago. I have three WP installs in my webspace. Recently I’ve been trying some metaweblog apps: writely and now flock, but although they work in both of my two secondary blogs, I can’t make them work at my primary. I just get the same error again and again. I’ve re-installed WP twice, but there’s no improvement.

Writely says “response from server doesn’t contain valid XML” and flock says that there’s an error detecting the configuration of my blog.

Any ideas on the problem, please?

In case you need it:

The blogs that work: https://www.alvarezperea.com/mirblog and https://www.alvarezperea.com/joetheisland

Not functioning blog: https://www.alvarezperea.com/alberto/weblog

Thanks in advance!