Cant boot up neither Mac or Windows

[iNassar]

I was using my mac and it suddenly froze after I installed the new adium version 1.4. I shut it down and to my surprise it didnt boot up!.. I tried to boot with windows but a warning appears telling me that there is no boot device.. I tried also to boot up with the leopard cd but it didnt work either. Finally I found this " try rebooting in single user mode. Hold down Cmd-S when you boot. It boots into a command line unix interface. Run the suggested "fsck -fy" to fix any disk issues that are fixable. Then try a reboot (you can just type "shutdown -r" on the command line, or "halt" then reboot with the power button." the result is that it apparently fixed some issues with my mac hd , but when I tried to boot up again the problem persisted. Any suggestions??