Error establishing database connection

everything was working fine until i click duplicate a site and look what happen to main site .

do i have to delete everything and star from scratch

http://www.vppromo.in
Error establishing database connection

If your site does not display, please contact the owner of this network. If you are the owner of this network please check that MySQL is running properly and all tables are error free.

Could not find site vppromo.in. Searched for table wp_blogs in database vppromo_wrdp1. Is that right?

What do I do now? Read the bug report page. Some of the guidelines there may help you figure out what went wrong. If you’re still stuck with this message, then check that your database contains the following tables:

wp_users
wp_usermeta
wp_blogs
wp_signups
wp_site
wp_sitemeta
wp_registration_log
wp_blog_versions

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please help me i’ll been working for a week now on this.. i just want to cry.

thanks
a desperate girl from FL