I just succesfull install the zenphoto on the server. but when i view the gallery its nothing but only white screen appear. our link is http://galeri.myharakah.net/pgaleri/

Please check the server logs and Zenphoto logs for errors.

2015-10-26 16:32:56 42.0.28.85 Admin access Failed /pgaleri/zp-core/admin-upload.php

2015-10-26 16:43:07 42.0.28.85 {103.26.251.139} Admin access Failed /pgaleri/zp-core/admin-users.php?saved=&show[0]=admin&show[1]=admin&page=users

Please check the files/folders permissions.
http://www.zenphoto.org/news/permissions-for-zenphoto-files-and-folders

i just check all permission and its ok..all directories set to 755 and all file set to 644

That's the Zenphoto security log if I am not mistaken. You need to look into your server (PHP) error log instead.