disk utility probs...

howdy there
i have a wee prob that i'd like some help with if possible.
i ran a system check with onyx and maintenance, and found that my disk needs to be repaired. so i followed the instructions and inserted my start up disk to run the disk utility app from the cd.the app doesn't seem to open and it keeps quitting down unexpectedly. i get this message when i see why:
-------
Process: Disk Utility [417]
Path: /Volumes/Mac OS X Install Disc 1/Applications/Utilities/Disk Utility.app/Contents/MacOS/Disk Utility
Identifier: com.apple.DiskUtility
Version: 10.5.8 (198.16)
Build Info: DiskUtility-1981600~17
Code Type: X86 (Native)
Parent Process: launchd [172]

Date/Time: 2008-12-28 12:28:49.499 +0000
OS Version: Mac OS X 10.5.6 (9G55)
Report Version: 6

Exception Type: EXC_BREAKPOINT (SIGTRAP)
Exception Codes: 0x0000000000000002, 0x0000000000000000
Crashed Thread: 0

Dyld Error Message:
Symbol not found: ___commpage_dsmos
Referenced from: /Volumes/Mac OS X Install Disc 1/Applications/Utilities/Disk Utility.app/Contents/MacOS/Disk Utility
Expected in: /usr/lib/libSystem.B.dylib
---------

please help me as i want to save my wee macbook pro!

regards,
rik

Have you got an external disk free, and / or a time machine back-up

hi there louishen

i do not have an external disk free or time machine back up
rik.

you could try repairing permissions first but I would seriously consider getting an external and trying to back-up first

cool man, cool. i may burn all my documents etc onto a few cds or so.i guess then i'd have to reinstall leopard??
any ideas what the problem is btw???
thank you man))
rik

just as a last thing, make sure your install DVD is nice and clean and have another go