Viewing million of data error (Unable to select the specified database)

[eluser]rochellecanale[/eluser]
Actually my database is running in autoload.php. And my database.php is correct i double check every variable i set in this page. Only the member list is causing this error and the other pages is running perfectly. I think it is the execution time in mysql. The last record i tried to display is 19,000 member and it displays. I only overwrite my member table replacing it to 2 million member.