Ok bro, 1st mistake is not enough information to answer your post. Also im just gonna take a shot on what your asking. Are you talking about you put a 4.00 spoofer on a Jailbroken 3.55? Also are you sayn you were on 4.00 and tried to put one on? Just gonna say a 4.00 Spoofer is for the jailbroken consoles so they can go online if you need help with that go to the search box and type in PS3 4.00 Spoofer and see the search results but as in you didnt put much info I really cant help you sorry