You need to click the unknown device icon and search and install the drivers. If you have the disc that came with the machine, then they should be on that. One possibility is that you didn't follow the device installation instructions properly. Missing out some step that is required. So read the installation instructions carefully again. Double check that you haven't missed something. I know that these days for example some printers tell you when to connect them to a PC. Connecting the cable before then can cause problems.
One final thing check the cable that connects it. I had one once that though it knew there was a printer, it just couldn't recognise it, just like yours. I replaced the cable and it detected the printer straight away - name, everything!!!