Problems importing phpbb to vb 3.7.1

[محروم.كوم]

I've done all i read in the guide:
download impex, configured ImpExConfig.php
uploaded impex with phpbb3 dir

i write the customer code
but when i click on Import in admincp i get blank page.

i saw if i put on ftp the vb3 dir it comes the modules for import.
and i don't know why.



Someon can help me? __DEFINE_LIKE_SHARE__