"file is now available" pop up crashing excel vb.net code

[Microsoft]

I have a porgram that opens an excel workbook and modifies some data, but
almost randomly a box will pop up in the workbook telling me the file is now
available and to hit ok or cancel. This crashes my program. Is there a way
to open the workbook so that it does not display this box? I open the
workbook as an object because some people here use office 2000 and some use
xp

'create the xl object
Dim xl As Object

xl = CreateObject("E xcel.Applicatio n")

Dim xlwb As Object = xl.Workbooks.Op en(TextBox2.Tex t, notify:=False)
....... I've also tried Dim xlwb As Object =
xl.Workbooks.Op en(TextBox2.Tex t, notify:=False)

Dim xlws As Object = xlwb.Sheets(1)

xl.displayalert s = False

xl.interactive = False

xl.Visible = True

If I put a stop before the code that writes to the workbook, I can clear the
box after it pops up and the program then continues on.

Here is an example of the code I use to write to the worksheet. Seems pretty
standard to me

if xlws.Cells(1, 1).value <> "Machine name" Then

xlws.Range("A1" ).EntireRow.Ins ert()

xlws.Range("a1" , "z1").Font. Bold = True

xlws.Cells(1, 1).value = "Machine name"

xlws.Cells(1, 2).value = "MS04-041"

xlws.Cells(1, 3).value = "MS04-043"

xlws.Cells(1, 4).value = "MS04-044"

xlws.Cells(1, 5).value = "MS05-001"

xlws.Cells(1, 6).value = "MS05-002"

xlws.Cells(1, 7).value = "MS05-003"

xlws.Cells(1, 8).value = "Reboot Status"

End If