Tiger booting problem.

Help! My macbook pro won't boot. It hangs at the white screen after the chimes. I did the "c" key with mac disk, and used disk utility. It said "disk utility stopped repairing "disk0s2" because the following error was encountered: The underlying task reported failure on exit." I hae alot of school data on this mac. Can anyone help me solve this problem? THanks

booting problem

Help! My macbook pro won't boot. It hangs at the white screen after the chimes. I did the "c" key with mac disk, and used disk utility. It said "disk utility stopped repairing "disk0s2" because the following error was encountered: The underlying task reported failure on exit." I hae alot of school data on this mac. Can anyone help me solve this problem? THanks

Someone will correct me if I am wrong here, but I believe now would be a good time to get a copy of Disk Warrior. It can fix file systems that disk utility can not.

I tried that. It saids that "the new directory cannot replace the original directory because of a disk malfunction" Now, it froze a little way when it was rebuilding for the second time. And i pressed the button to force shut down. Now the mac won't boot up. It chimes like 4 times at the white screen. HELP!