I got the solution !!!
go through 'zp-config.php' file and just check it out database name (its a name which u given on time of installation).Go to MYSQL command prompt and create a database which u got from 'zp-config.php' file..now run PATH/zp-core/index.php..it will give error of NO tables found..and also give u a link of 'run setup script again',,click on it,,,now again it redirect to u SETUP page,but this time u ll not get any error,,click on GO button (at end of the page) and it ll ask u to create Admin name,Password etc etc

Hope it ll help....

do post here if u still getting problem..