5xx error

I submitted all the sitemaps to google sitemaps and this isthe error I'm receiving:

Code:

 5xx error   - robots.txt unreachable

I've got robots.txt in my /forums. Should I also put it in /vbseo_sitemap/data/ ?

Other than that, thats the only error.

robots.txt on goes in the root of your site. That's the only place search engines will look for it. Make sure it contains full paths to any exclusions.

Ex.

/forums/newreply.php