Problem with ror.xml sitemap

[fonesunlock]

This error appears in Google Webmaster Tools:

Line   Status   Details
11                   Incorrect namespace
                        Your Sitemap or Sitemap index file doesn't properly declare the namespace.   

Parent tag: item
Tag: type
Problem detected on: Jul 21, 2009

My ror.xml sitemap is placed here: [ External links are visible to forum administrators only ]

Any ideas why I'm getting this problem? 

[XML-Sitemaps Support]

Please try to upload attached file to generator/poages/mods/ folder (overwrite existing file) and recreate sitemap.

[fonesunlock]

Worked a treat, thank you!