run-time error '2147417851' (80010105') method of 'open' of object 'workbooks' failed

run-time error '2147417851' (80010105')  method of  'open' of object 'workbooks' failed while opening excel -workshooet in vb 6 program

program coding  
-----------------------
Private Sub OpenExcelDataBase()
'**********************************************************************
'**  CONVERT DATA FROM EXCEL TO SQL DATABASE
'**********************************************************************
    Dim fs
    Set fs = CreateObject("scripting.filesystemobject")
    SelExcelFileName = Trim(ctlSELEXECLFILENAME.Text)
    If Trim(Len(SelExcelFileName)) = 0 Then
       MsgBox "Select Excel file", vbCritical, Me.Caption
       cmdFILESEARCH.SetFocus
       Exit Sub
    End If
'**********************************************************************
    If Not fs.FileExists(SelExcelFileName) Then
        MsgBox "Warning - Not a valid Excel file name ", vbCritical
        Exit Sub
    End If
'**********************************************************************
    XLSBK.DefaultFilePath = SelExcelFileName
'**********************************************************************
    XLSBK.Workbooks.Open SelExcelFileName, , , , , , , , , True  ' <-----here erroe is generated---->
    XLSBK.Visible = False
'**********************************************************************
    If Trim(Len(Trim(ctlEXCELNO.Text))) = 0 Then
       ctlEXCELNO.Text = "0"
    End If
'**********************************************************************
    If Trim(Len(Trim(ctlEXECLHEADER.Text))) = 0 Then
       ctlEXECLHEADER.Text = "0"
    End If
'**********************************************************************
    SelExcelNo = Trim(ctlEXCELNO.Text)
    SelExcelHeaderNo = Trim(ctlEXECLHEADER.Text)
    If SelExcelHeaderNo = 0 Then
       SelExcelHeaderNo = 1
    Else
       SelExcelHeaderNo = SelExcelHeaderNo + 1
    End If
    If SelExcelNo = 0 Then
       SelExcelNo = 1
    Else
       SelExcelNo = SelExcelNo + 1
    End If
    Set XLwsh = XLSBK.Sheets(SelExcelNo)
'**********************************************************************


vb-excel-error.bmp