Script Execution Usage Limit Exceeded

We receive the following error message when trying to run the script below.

Environment: Production
Date & Time: 2/14/2014 3:32 pm
Execution Time: 790.35s
Script Usage: 10005
Script: UpdateAllBisac
Type: Scheduled
Function: updateAllBisac
Error: SSS_USAGE_LIMIT_EXCEEDED
Script Execution Usage Limit Exceeded
Stack Trace: updateAllBisac(updateallbisac.js$843955:52)

function updateAllBisac() {
var searchResults = nlapiSearchRecord('item', 'customsearch5022' , null, null);
var searchedItemId;
var lastId;
var completeResults = new Array();
var arrNewFilters = [];


if (searchResults != null) {
        completeResults = completeResults.concat(searchResults);
    }

else {
    completeResults = null;
    nlapiLogExecution('Debug', 'No item found', weight + ' Null result');
}
if (completeResults != null) {

if (searchResults.length == 1000) {

  while (searchResults.length == 1000) {

   //Initialize variable
   lastId = "";
   //Get Record Id of Last record,