little bit of devhook help

What's up guys? I recently installed devhook 0.46 to my psp with 2.71 firmware, but every iso that i've tried to run doesn't work. I used a devhook full installer and the setting i used are as follows:

UMD-MODE: Image+ANYMUD
Firmware: 2.71
cpu clock: 222 MHz
boot select: reboot xmb

I didn't really mess with the other settings that much and my firmware right now is 1.5. Do I have to upgrade it to 2.71 or is there something else that i'm missing? Any help will be greatly appreciated.

Please do not update. Thats the last thing that you need to do.
This is what yuo're settings should be if you are to boot in 2.71 firmware with a UMD game:

UMD SELECT: UMD Disc
UMD MOUNT:UMD DISC
UMD VERSION: no change
FIRMWARE: 2.71(MS hook)
CPU CLOCK: 222 Mhz (333 if need of smoothness, but messes with networks functions, see T08 about this)
BOOT SELECT: Reboot XMB
PL-ADR: 89000000 (in: OTHER/preload address menu)

If you are booting a backed-up ISO game:

UMD SELECT: select your ISO
UMD MOUNT: ISO ANYUMD
UMD VERSION: no change
FIRMWARE: 2.71(MS hook)
CPU CLOCK: 222 Mhz (333 if experiencing lag but network functions will have issues, see T08 about this)
BOOT SELECT: Reboot XMB
PL-ADR: 89000000 (in: OTHER/preload address menu)

Double check you're settings, and make sure you always have a UMD in the drive for it to boot.