I just downloaded imagevue_x2.1.2_20090601 and after uploading on server I got errors that those two files are missing:
/content/folderdata.xml
/imagevue/config/users.php
X3Photo Gallery Forums
X3 Photo Gallery Support Forums
They are not missing, they cannot be created, you need to chmod content/ and imagevue/config/ dir so they become writable by php.
Check here:
https://www.photo.gallery/37
Check here:
https://www.photo.gallery/37
firedev.com