Originally Posted by SOkneeSLAP
d/loaded this pereb27 from demoniod may moons ago
That doesn't tell me how you updated.
Anyway if you are on 3.56 right now you need a flasher to downgrade again.
EDIT : Tried to decipher your first post again, did you mean you used the 3.41 (3.56) downgrader PUP?
If you go to system settings > system information, what firmware does it say you have?
PS3 Slim CECH-3004A 160GB (500GB)
PS2 Slim SCPH-70004 - FMCB 1.8b