RSS feed 404 error (again)!

Hello

My RSS feed keeps on returning a 404 error sometimes it will work and then it just stops and all I have done is post blog posts.

I have disabled all my plugins but it’s still not working does anyone have any ideas why it sometimes works and why it stops working

here is my previous post about the problem

my site is http://mrstextiles.com/?feed=rss2

Many thanks

Gaby