Excel ASP/VBA is hanging

[donishere]

I am trying to write a simple ASP page that will open an existing spreadsheet on the server, modify a few cells, and then save it.

	Dim xlapp       ' Our Excel App
	Dim wb       	' Our Workbook within the Excel App
	Dim ws       	' Our Worksheet within the Workbook   
	Dim crt       	' The chart object
	Dim SourceRange	' The Source Range for the chart object
	
	Const xlWorkSheet = -4167 
	Const xlLineMarkers = 65
		
	' -- Create an instance of Excel Application
	Set xlapp = Server.CreateObject("Excel.Application")
	xlapp.Workbooks.Open ("C:\Inetpub\[URL unfurl="true"]wwwroot\charts\SystemsUptime.xls")[/URL]
	xlapp.Application.Visible = False
	Set ws = xlapp.ActiveWorkbook.Sheets("Internet")
	
	' -- Insert data
	ws.Range("K21").Value = "Jan"
	ws.Range("K22").Value = "Feb"
	ws.Range("K23").Value = "Mar"
	ws.Range("K24").Value = "Apr"
	ws.Range("K25").Value = "May"
	ws.Range("K26").Value = "June"
	ws.Range("K27").Value = "July"
	ws.Range("K28").Value = "Aug"
	ws.Range("K29").Value = "Sep"
	ws.Range("K30").Value = "Oct"
	ws.Range("K31").Value = "Nov"
	ws.Range("K32").Value = "Dec"
	
	ws.SaveAs "C:\Inetpub\[URL unfurl="true"]wwwroot\charts\SystemsUptime.xls"[/URL]
	Set ws = Nothing
	Set wb = Nothing
	' -- Quit Excel to conserve resources
	xlapp.Quit
	Set xlapp = Nothing
	Response.Write "THE END"

Instead, IE just sits there spinning. Eventually, the page finishes loading, but the Excel spreadsheet remained unchanged.

What's going on?