UBB.Developers Forums UBB.classic V6 MultiHack Mods [6.0x] Introducing: UBBNews 2!

I have hacked everything right. when I call directly from the browser it works fine, but when I insert a SSI call it gives me this, " HTTP/1.1 404 Object Not Found Server: Microsoft-IIS/5.0 Date: Mon, 30 Jul 2001 08:02:07 GMT Content-Type: text/html
404 Object Not Found " , I tihnk I know why, its not my host because I can use news pro fine. but I can't use this, is the reason because I have my UBB hosted on forum.undertakerinc.org, and my site on underinc.org, so my SSI call looks like
( ), if you go directly to my news you can see it, but the text is black, any reson on why thats happened, if someone can help me out that would be good

thanks in adavance.