Subscript Out of Range Error on Web Function

Greetings to all.

I have a problem with the following Web Pivot Table function causing a "Subscript Out of Range Error".   I have narrowed the issue down to what appears to be the "$" character used in the following statement from the code below:  "   v.DataAxis.InsertFieldSet(v.FieldSets("COS$I01"));  "

Any help would be greatly appreciated.

Thank you in advance,

Keith




Full code of function


 function rptCorrections()

      {
                  
       <!-- Declarations -->
            
         var v = pivot.ActiveView;
         var c = pivot.Constants;
                  
      <!-- Set Connection to Database -->
                  
                      pivot.ConnectionString = "Provider=MSPersist.1";
         pivot.CommandText = "../DataConn/GetXMLData_Corrections.asp";
         pivot.DisplayFieldList = false;
                  
      <!-- Choose Fields for Initial View -->
                  
        v.RowAxis.InsertFieldSet(v.FieldSets("WHSE"));
        v.DataAxis.InsertFieldSet(v.FieldSets("COLCI01"));
        v.DataAxis.InsertFieldSet(v.FieldSets("AVGCOR"));
        v.DataAxis.InsertFieldSet(v.FieldSets("DRLCI01"));
        v.DataAxis.InsertFieldSet(v.FieldSets("AVGDRO"));
        v.DataAxis.InsertFieldSet(v.FieldSets("TOTLNE01"));
        v.DataAxis.InsertFieldSet(v.FieldSets("AVGLIN"));
        v.DataAxis.InsertFieldSet(v.FieldSets("PCNTCOR"));
        v.DataAxis.InsertFieldSet(v.FieldSets("COS$I01"));
        v.DataAxis.InsertFieldSet(v.FieldSets("CCORPER"));
                  
            <!-- Set the field captions -->                  
      
       v.Fieldsets("WHSE").Fields("WHSE").Caption="Warehouse"
       v.Fieldsets("COLCI01").Fields("COLCI01").Caption="Corrections Total"
          v.Fieldsets("AVGCOR").Fields("AVGCOR").Caption="Corrections Average"
       v.Fieldsets("DRLCI01").Fields("DRLCI01").Caption="D R O S  Total"      
       v.Fieldsets("AVGDRO").Fields("AVGDRO").Caption="D R O S  Average"      
       v.Fieldsets("TOTLNE01").Fields("TOTLNE01").Caption="Total Lines"
          v.Fieldsets("AVGLIN").Fields("AVGLIN").Caption="Average Lines"
       v.Fieldsets("PCNTCOR").Fields("PCNTCOR").Caption="Percent of Corrections Per Line"      
       v.Fieldsets("COS$I01").Fields("COS$I01").Caption="Cost of Correctioins"
       v.Fieldsets("CCORPER").Fields("CCORPER").Caption="Cost of Corrections Per Line"

      }