I am coding dynamic visual force components in my controller and have had success rendering the Inputfield component and SelectList compnent where the Multi-Select Attribute is False however having trouble when the attribute is set to true.

Here is the controller code and page code snippet:  Red text shows the error I am receiving.

Thanks in advance for your help

  for(Service_Task_STQ_Joiner__c STQ: STQList){
        
                STRRList.add(new Service_Task_Request_Response__c());


    // Picklist field code block
                        
                        if(STQ.Service_Task_Request_Questionnaire__r.Type__c == 'Picklist (Multi-Select)'){
                                 
                                 Component.Apex.SelectList STQPicklist = new Component.Apex.SelectList();
                                 
                                 List<String> STQPicklistValues =         STQ.Service_Task_Request_Questionnaire__r.Values__c.Split(':',0);
                                 
STQPicklist.Multiselect = True; /* ERROR when I load VF page: System.VisualforceException: Invalid value for property multiselect: Attribute multiselect for component <apex:selectList> cannot be changed after the component has been created */
//If STQPicklist.Multiselect = False; renders fine, however I need Multi-Select option

	STQPicklist.expressions.value = '{!STRRList[0].Response__c}';
        STQPicklist.Size = STQPicklistValues.Size();
        STQPicklist.id = 'STQPicklist'+i;
       STQPicklist.Required = STQ.Service_Task_Request_Questionnaire__r.Required__c;
        STQPicklist.Title = STQ.Service_Task_Request_Questionnaire__r.Help_Text__c;
                                
      Component.Apex.selectOptions STQOptions = new Component.Apex.SelectOptions();
                                 
                                                                 
          Component.Apex.OutputLabel STQOutputLabel = new Component.Apex.OutputLabel();
          STQOutputLabel.value = STQ.Service_Task_Request_Questionnaire__r.Label__c;
          STQOutputLabel.for = 'STQPicklist'+i;  
                                 
         STRRList[0].Service_Task_Question__c = STQ.Service_Task_Request_Questionnaire__r.Label__c;
                                 
                                 dynPageBlockSection.childComponents.add(STQOutputLabel);
                                 dynPageBlockSection.childComponents.add(STQPicklist);
                                 
                                  for(String s: STQPicklistValues){
                                Component.Apex.selectOption STQOption = new Component.Apex.SelectOption();
                                 	STQOption.itemValue = s;
                                 	STQOption.itemLabel = s; 
                                 	STQPicklist.childComponents.add(STQOption);
                                  }
                        } 

 <apex:page showheader="false" controller="CusReqController" action="{!ServiceTaskQuestionnairePageLoad}">
   
 
   <apex:form >

   
   <apex:dynamicComponent componentValue="{!DynamicForm}"/>  
    

    </apex:form>

   
</apex:page>