these are the steps I cannot do (last few of 4.2 walkthrough):

"Run apps/ATDM/boot.dol from the Homebrew Channel
Select IOS236 as the IOS to start and push A to confirm.
Navigate to "System Titles" and push A to confirm
Select "IOS222" and push A to delete then A again to confirm.
Select "IOS223" and push A to delete then A again to confirm.
Select "IOS249" and push A to delete then A again to confirm.
Select "IOS250" and push A to delete then A again to confirm.
Push Home to exit AnyTitle Deleter Mod"

they are the last few step of the 4.2 section, when I try to start IOS236 I receive these errors:

"Initializing Filesystem driver...OK!
Wiping off fingerprints...
- Deleting ticket file /ticket/00000001.tick...
Ticket delete failed (no ticket?) -102
- Deleting ticket file /ticket/00000001...
Error! ISFS_Delete(ret = -102)

Checking system region...
Pulling Sysmenu TDM...Error! ISFS_Open (ret = -102)
Reading TDM failed!
Error! ES_OpenContent (ret = -1017)"

I already tried to go on and test usbloader, but it doesn't work (it crashes when i open)
please need some help!!!