I'm not trying to log into my own box. I'm trying to connect to a network server.

The name goes like xxx.xxx.xx.xx/name.

Again, this worked perfectly fine yestserday..

Login mode is set to "Single Mode" but I'm able to select it when I first open up the Management Studio.

Only when I try to open up the new query window to connect to the Database Engine, it wouldn't even give me the option.