Highcharts column Point Click
===

Hello I have already asked a question on Highcharts Point Click not working. Further to that what I have found is my click function works in google chrome but not in IE 8. Can you please help me with this? I am not getting any responses on my earlier question hence I am posting this again - 

Below is my code - 

    var columnoptions = {
    				chart: {
    					renderTo: 'container',
    					type: 'column'
    				},
    				title: {
    					text: 'Exposure Details - Column Chart'
    				},
    				xAxis: {
    					categories: []
    				},
    				yAxis: {
    					title: {
    						text: 'Exposure'
    					}
    				}, 				
    				plotOptions: {  
                series: {
                    cursor: 'pointer',
                    point: {
                        events: {
                            click: function() {
                                alert ('here');
                            }
                        }
                    }
                } 
            },
    				series: []
    			};   


and below is the function which draws column chart - 


 function displayColumnChart(){
      
         columnoptions.series = [];
         columnoptions.xAxis.categories = [];            
          var seriesOptions = {
						name: 'chart',
						data: [],  						
					
					};
         for(index = 0; index < categoryArray.length; index++){
         
             columnoptions.xAxis.categories.push(categoryArray[index]);
          
             seriesOptions.data.push(valueArray[index]);   		
         
         }      
         
         columnoptions.series.push(seriesOptions); 
         chart = new Highcharts.Chart(columnoptions);
       }

Is it because the way I am dynamically creating this chart? Please guide me regarding this.  I am getting error - Object doesnt support this property or method. Highcharts.js line 25. Code 0. Char 55. I wish to implement chart drill down. Hence need to get this working. And IE is standard browser in the company. Please help me. 			