Create Excel Object via vb script in a Network Folder

Hi,
I am using Vb Script in HTML to read an xml file and upload the same to Excel in a formatted manner. The problem i am encountering is in the CreateObject("Excel.Application")
command.

When i save the Html File and the xml file to my local drive and then open the html and click on the button to download..the Excel Application is getting opened.
But if i save both the files to a folder on my network(mappped as Z: Drive)..then the CreateObject is not working. Can someone help me on this...

The code is as follows:

<SCRIPT LANGUAGE="VBScript">
' Declare the Constants
Const xlNormalView = 1
......
' Declare the work variables
Dim retVal
Dim FsWkTxt........

Sub Download2Excel
Set xlApp = CreateObject("Excel.Application")
xlApp.Visible = True
xlApp.Workbooks.Add
xlApp.ScreenUpdating = False
DateMsg = "Generated on - " + FormatDateTime(Now(), 0)
' Load the xml file
strFileName = "Stock Report.xml"
Set oDoc = CreateObject("MSXML2.DOMDocument")
oDoc.async = False
oDoc.validateOnParse = True
oDoc.Load strFileName

If oDoc.parseError.errorCode = 0 Then
R = 0
C = 0

For Each ANode In oDoc.childNodes 'For each ROOT
If ANode.hasChildNodes Then
xlApp.ActiveCell.Offset(R, C).Value = ANode.NodeTypedValue
xlApp.ActiveCell.Offset(R, C).Font.Bold = True
xlApp.ActiveCell.Offset(R, C).Font.Size = 11
R = R + 1
End If....
Next
End If....
.........
........
End Sub

Thanks in Advance,
Prajeesh Krishnan