web server folder registry

I have an xml file called index.xml this is in my website here: www.mywebsite.com/siteregistry开发者_开发问答/index.xml when a user visit the site like this: www.mywebsite.com/siteregistry/ there is a page "FORBIDDEN"; however, if a user goes to this link: www.mywebsite.com/siteregistry/index.xml they see all the url links.

how can i force www.mywebsite.com/siteregistry/ to display the same files as this: www.mywebsite.com/siteregistry/index.xml

i guess logically this link www.mywebsite.com/siteregistry/ is looking for an index.html or index.php, how can i include index.xml into the mix?

many thanks

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You could try adding it as a default document in IIS?

eg where you have index.html and default.aspx could you add the xml file?