Datatable on Codeigniter PHP rookie..

modify55

i put Datatable to my project (PHP codeigniter framework).I can integrate it in the beginning and i can show data from my oracle by JSON,
but when i select to show all rows IE will show alert script will take long time and waitting about 5s and then data show but on firefox it doesn't ,the number of rows is just 7000 rows.I think i make some mistake,Please help.