nOrig null error

Hi ,

I am loading datatables. js on my page and creating a data table. First time its working fine. But when i again try to create a data table it is giving me error that nOrig is null at this code:

nOrig.insertBefore(oSettings.nTable, oSettings.nTableReinsertBefore);

line no. 5491 in jquery,datatable.js file.

please reply ASAP.