(adsbygoogle = window.adsbygoogle || []).push({}); right so what it is... I was on 3.55 cfw (kmeaw) i updated to rebug 4.21.2 so i could get to dex and start Real Time Moding.. then when i was trying to get to dex i was struggling so i searched and got derek trotters tutorial up CEX2DEX CFW4.21 i then relised you need to dump your EID Root Key on 3.55 before i updated i was reading about QA Flagging, i downloaded the qa flag.pkg and runned it several trimes and tried to do the button combination on 3.55, i could not do it i must have tried about 50 times.. anyway so i updated.. now i want to downgrade back to 3.55 cfw but everytime i use the rebug 999 downgrader i get error data is corrupted (8002F169) ive tried everything and i still get the error i really need to get back to 3.55... ive made sure system update debug is off also tried it on, people say turn qa token off in toolbox but that option is not there for me? my folders like this PS3>UPDATE>PS3UPDAT.PUP.. SOMEONE PLEASE HELP ME OUT IVE BEEN TRYING FOR DAYS NOW THANKS

i got the same problem im on rex rebug 4.21 too and i cant downgrade for some reason.....
maby u should try to downgrade with rogero downgrader that's what im going to try at the weekend....

1- If you have qa-flag activate look on "system update" 4 option and update only via storage, if you don't have qa-flag active on "system update" look 2 option (update via internet or via storage).

2-If you have Rebug 4.21.2 now you try install on Rebug 3.55.4!! You think "him is crazy", but i have install on Rebug 4.30.1 the Rebug 4.21.2 without downgrade ant working fine for me...Also you install Rogero 4.21 on Rebug4.21.2 and try downgrade with 4.25 downgrade.PUP (find with google).

thanks for reply mate ive sorted it now i went from rebug 4.21.2 > rogero 4.21 then downgraded with 4.25 pup now i will make sure i qa flag now im on 3.55 also mate could you help me out with this if you know.. when im trying to go to cex to dex on rebug 4.21.2 i get an error when i type c2d.exe eid_key_file.bin in_flash.bin out_flash.bin into cmd it says cant find openssl.exe in c:/ i have it in there tho thanks once again

use the downgrade pup from recovery mode..then its work..

do you have tried to downgrade with the Recovery Menu?
try to do it with the 999 downgrade.