Destroying Excell (objects)

From a Acces2000 module I want to manipulate a excell sheet in a new instance of excell. When I run the code below an instance of excell seems to be persisting in memory(my taskmanager says so). When I push the stop button in my code window its gone, althoug my code has finished executing earlier. Running the code twice without using the stop button or exiting the application althogeter I get an error 1004 on line:
ExSH.Copy after:=Worksheets("sheet1")




Public sub Start
Dim iDoc As clsDoc
Dim iRegel As clsRegel
Dim ExAp As Excel.Application
Dim ExWB As Excel.Workbook
Dim ExSH As Excel.Worksheet
Dim iTeller As Integer

Set ExAp = New Excel.Application
ExAp.Visible = True

iTeller = 1

Set ExWB = ExAp.Workbooks.Open("C:\stan\uitslag\uitdocschoon2.xls")

ExAp.AlertBeforeOverwriting = False
ExAp.DisplayAlerts = False
For Each iDoc In Sale.Docus
    Set ExSH = ExWB.Worksheets("sheet1")
    ExSH.Copy after:=Worksheets("sheet1")
    Set ExSH = ExWB.Sheets(2)
    'Sub vullen takes a byRef excell.worksheet parameter
    iDoc.Vullen ExSH
    ExSH.Name = iDoc.TruckID
    Set ExSH = Nothing
    iTeller = iTeller + 1
Next
Set ExSH = Nothing
ExWB.Worksheets("Sheet1").Delete
ExWB.SaveAs "C:\Stan\uitslag"
ExWB.Close
Set ExWB = Nothing
ExAp.Quit
Set ExAp = Nothing
End sub