Please, take a look at http://markboyarsky.com/zp-core/setup.php?autorun=gallery
I have just uploaded the installation files and got this.

You are generally having file permissions problems on your site. Some to the extent that your file system is not even allowing PHP scripts to be found and loaded.

settting permisstions to 777 has helped

Glad things are working. However, you should be aware that 0777 is a pretty insecure file permission setting. Perhaps you should talk to your provider about this. Given the amount of hackers out to compromise WEB sites "public" files are really not a good idea.