HELP! Error 800200D9 When loading UMD?!??!?!?

[spamaps]

3.71 M33-4 Won't load "Monster Hunter 2: Freedom" from the UMD or ISO. Error 800200D9! i read it was "bad block". PLEASE HELP! I upgraded a kid at schools psp from 3.40 OE-A to 3.52 M33, then 3.71 M33-4 and he'll be pissed if his UMD wont work. WTF is wrong? how do I fix this?

[Wally]

Please take this to :

www.dcemu.co.uk/vbulletin

Looks like you already have ^_^.

Go away.