iTunes only works in 64 bit mode and older movies doesn`t play

Hello,

I have ~400 movies, including tv shows and movies, but from the last iTunes updated, I cannot play my library or add news movies, not from iTunes menu ou using iFlicks as always did. And my home sharing didn`t working anymore.

I read googled about and I think it`s maybe because some issues with 64 bit mode, but iTunes will not working in 32 bit anymore, so what should I do? Any help????