All the Cheat devices keep on Freezing PSP

[SFX]

I tried both of the above methods but, I will try again. Hope it works.

[xKiiNgJaMeSx]

I had a problem like this one where my CSO would freeze everytime I tried to use a code to unlock the guns, offline and online. What might be the problem is that all of your codes are from before the 1.1 patch. If you use any codes from before the 1.1 patch, your game will freeze automatically. Sorry if this isn't the case, just giving an idea is all =)