Can't create/write to file './forum/phpbb_auth_access.frm'

[N@s@]

Dupa ce am reusit si eu sa imi configurez apashul , php si mySQL acuma primesc eroarea urmatoare la instalare:
An error occurred trying to update the database
Can't create/write to file './forum/phpbb_auth_access.frm' (Errcode: 13)

Am versiunea de phpBB-2.0.17.

Ce pot face ?

[flowers]

MySQL are permisiune de scriere pe directorul /forum/ ?