why i can't reach the sitemaps - i'm getting error in google

[info2699]

hello

why i can't reach the sitemaps - i'm getting error in google
for example :
i can go to the page [ External links are visible to forum administrators only ]

but i can't reach  [ External links are visible to forum administrators only ]
[ External links are visible to forum administrators only ]

why ?
i cant' understand it

[XML-Sitemaps Support]

Hello,

there is a mistake in the URL: it should be sitemap_image.xml instead of sitemap-images.xml.