Cannot find server wp-login

I’m running my own server with Apache, and I installed WordPress 1.2.1…
I can log in and post on the computer that I installed my server on, but I can’t access WordPress from my other computer. The actual page shows up fine, though. If I try to go to wp-login.php on that computer, it just goes to a “Cannot find server” page. I’m not sure if this is a server problem, but I never had a problem with it before.
Sorry if this is not clear, I’m kind of new to php..