Endless Paradigm

I'm pretty helpless when it comes to PSP theming and I wanted to use a old, partially customized theme again originally made by Schmilk. I'm sure it worked fine on 5.50 GEN before, just when I use it now, whenever I click on Music, Video or Photo, my PSP freezes and shuts off.
Only happens with this theme and I can't think of why...

Thanks for help in advance^^'

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:/ the custom image doesn't work either.

What custom image do you mean exactly?^^'