Why Google gives Unreachable URLs?

[cancan]

Hello...
I have already submit my google sitemap to google.But ı saw some errors.
Script Cat. and Feeds makes Unreachable URLs error.
I have totally (15) what is that? :)
Thank you...

/crafts/ethnic-and-regional/
/computers/internet/leenk-url-shortener-l17.html
/plugins/rss/feed.php?id=103

[Simon Gooffin]

Could you please provide us with your directory url? we would check the problem you have.