http://udit-online.com/zenphoto
i couldn't find the config file to enter the database information.
please tell me what the file name is?when i open zp-config.php i don't find the place where i have to enter the database info,can i get a screenshot!

Your site seems not to respond. Not much I can tell you. Setup will create the zp-config.php file with the data you provide it. You should not be editing the file directly. Specially since you seem not to be conversant with PHP code or you would be able to see where to enter the data.

what should i do now?

Answer a few basic questions. (It is pretty hard to provide any support with no information given.)

1. What version of Zenphoto are you installing?
2. How is Zenphoto being installed? By the instructions on Zenphoto.org or by a third party install package
3. Is your server setup to run PHP?
4. Is it setup to treat index.php as a home page.