Is there an index.php or default.php in the root of your site? If so, are there any header() calls in it?
Also check for a .htaccess file in the root of your website. Just so people don't get redirected to a spam/advertising site, I've removed the link in your post that was redirecting, but to make it clear, this is what is happening:
GET / HTTP/1.0
Host: nci.890.com
HTTP/1.1 301 Moved Permanently
Location: http://www.megago.com/l/?
Server: WebSTAR/4.2
EDIT: One thing I noticed is that all of the links point to nci.890.com instead of nci.890m.com .