Please help rogero 3.55 downgrader to rebug 4.21.2rex error (8002f157)

[Megaredvine]

Hello, i am trying to convert my cex ps3 to dex. So far i enabled qa flag, used eid root key, and now i am trying to update from rogero 3.55 downgrader cfw to rebug 4.21.2 rex so i could be one step closer to dex. Do i have to go back to 3.55 ofw to update to rebug? Or if anyone knows another method to up****** to rebug it would realy help. Thank you!!!!! in advance.

So far i have tried:
To update from xmb
Update from recovery

 

[Megaredvine]

Sorry, i think i posted this in the wrong section.

 

[Younis]

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