ImpEx phpbb3 to vB3.8.3 problems

[محروم.كوم]

Why does ImpEx hate me? I seem to have problems every single time.

I'm trying to import phpbb3 to vB3.8.3 (I know, should be 3.8.7 but installed 3.8.3 by mistake - will upgrade later).

I've installed ImpEx, checked all the files are present and correct, and reuploaded it too. ImpEx config is set and renamed as normal.

ACP > Import > Import = Internal Server Error 500

Reuploaded ImpEx again

Still internal server error

Any suggestions? Chmod looks fine and everything that should be there is there. __DEFINE_LIKE_SHARE__