WinWrap CreateObject("Excel.Application") Multiple Instances

Not sure how many people know about WinWrap Basic language which supports the .Net framework. But that is where my problem is. Hoping someone out there know about the language.

I am using it to communicate with Excel 2010. Basically I am extracting data for a proprietary data format and spitting it out to Excel. The following execute perfectly when no additional instances of Microsoft Excel 2010 are active during script run.

xExcel = CreateObject("Excel.Application") 
xBook = xExcel.Workbooks.Open(XLFilePath) 
xSheet = xBook.Worksheets(“Sheet1”) 
xExcel.Visible = False 
xSheet.Cells(1,1).Value = "Study Name"

However, if an additional Excel 2010 instance is activated manually by the user during the following script run, script errors out.

xExcel = CreateObject("Excel.Application") 
xBook = xExcel.Workbooks.Open(XLFilePath) 
xSheet = xBook.Worksheets(“Sheet1”) 
xExcel.Visible = False     
Do 
  xSheet.Cells(1,1).Value = "Study Name" 
Loop

The guys at WinWrap say that CreateObject() in WinWrap is a simple code that calls the CoCreateInstance API. I am sort of lost there. Can someone help me understand how create multiple Excel instances.