[RESOLVED] object variable not set

[biege]

I'm creating an array P & want to dump it's elements into an Excel worksheet :

Set oXLApp = New Excel.Application
Set oXLBook = oXLApp.Workbooks.Add
Set oXLSheet = oXLBook.Worksheets(1)
 
While param < Val(Text3.Text)
param = Val(Text2.Text) + Val(Text4.Text) * m
...
oXLSheet.Cells(m + 1, 1).Value = param
...
m = m+ 1
Wend
...
End Sub

I get a 'object variable or with block variable not set' error on statement :
oXLSheet.Cells(m + 1, 1).Value = param
Why?
I thought I created the oXLSheet object in the statement before the While loop : Set oXLSheet = oXLBook.Worksheets(1)
Does this not carry over into a loop ?!