The kiosk models don't get access to the store. The only way to get that ps3 onto the store, is that you have to downgrade it to 3.55. Then, there is a special update pup that you can apply that will convert it to a normal retail ps3. Then, you would update to 4.20 retail, and, you would be good to go. Check out this link:
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Short of doing the steps above, your kiosk ps3 is destined to a life without psn store access.
Originally posted by californiacoast
Is there any way i can go back to 4.20 ofw , im on 4.20 kiosk (Shop) . i got the 4.20 ofw i don't know if it didn't let me update cos ' i didn't get it from the playstation site or what but i just wanna go back . i can't go on psn store it useless you can't do anything on it . and for some reason my ps3 is stuck on bypass , it just sucks . if someone had the same problem can they tell me how to fix it ?