where put clientaccesspolicy.xml and crossdomain.xml ? - 404 not found error

I have S开发者_开发技巧ilverlight app and when I want to do some action Firebug show me that on this two files I have 404 not found error.

So should I insert this files somewhere in my solution or to IIS rootwww directory?

Or it's other solution of this error?

You should put those files in the root virtual directory of IIS, which defaults to C:\Inetpub\wwwroot\, such that the file shows up as "http://<yourdomain>/clientaccesspolicy.xml", or "http://<yourserver>/clientaccesspolicy.xml".