vB4 Redirect -- Redirects other sites on my same server

[Masked Crusader]

I own multiple sites and they all run on the same server. http://www.maskedcrusader.com is my vB4 site that I just upgraded today and http://www.maskedarmory.com is my other site. When you hit Masked Armory though, Masked Crusader is picking up and forcing a redirect. What the heck is going on and how do I stop it? Any ideas on how to troubleshoot this issue would be great as well.

Thanks!