Google webmaster tools Rss error

[rezapci]

Hi

My google Webmaster Tools are giving me an error at

http://www.alshiatalk.com/vb/external.php?type=rss2

Line:
4
URL not allowed
This url is not allowed for a Sitemap at this location. [?] Url:
[http://www.alshiatalk.com/vb]
what is the problem and how could I fix it?

[Floris]

I do not know. Google webmaster tools isn't written by us. Check with google please.

Our RSS2 feeds are compliant to the RFC