Hi everyone. i had just started to learn VB and VS2008 and im doing some system due to my homework. i made a WELCOME form with a timer, 5s to pass to the next form which called Select. After passed to next form, itll me.visible = false. Theres 3 buttons on the Select form which call Customer, Staff and Exit. As i had just start, the button Customer will pass to a MDI menu call Customer Menu with a menu strip button called Quotation. Same, Select will me.visible = false when done. Then a problem occured, i made a Quotation inside the Customer Menu, such as the mdiparent of Quotation is Customer. I expected that the Quotation button will disenable to press after i pressed that button. But i fail to do that. And the code below: This is the code of MDI menu Customer Menu: Public Class frmCustomer Private Sub ExitToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ExitToolStripMenuItem.Click End End Sub Private Sub AboutUsToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles AboutUsToolStripMenuItem.Click Dim frm As New AboutMamatai AboutMamatai.ShowDialog() End Sub Private Sub frmCustomer_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load frmQuotation.MdiParent = Me frmQuotation.Show() frmQuotation.Dock = DockStyle.Fill Me.Location = New Point(220, 180) End Sub Private Sub QuotationToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles QuotationToolStripMenuItem.Click frmQuotation.MdiParent = Me frmQuotation.Show() frmQuotation.Dock = DockStyle.Fill End Sub End Class This is the code of the form inside the Customer menu: Public Class frmQuotation Private Sub btnExit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnExit.Click frmCustomer.QuotationToolStripMenuItem.Enabled = True Me.Close() End Sub Private Sub frmQuotation_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load frmCustomer.QuotationToolStripMenuItem.Enabled = False End Sub End Class When im tryin to solve this problem, i found that the problem may cause of the me.visible = false of the Select form and Welcome form. Becoz when i set the Customer Menu be the first form to run. The problem is not exist. Is there anyone can help me ? P.S. I guess if the other two forms code is needed so i post them also This is the code of WELCOME form : Public Class frmWELCOME Private Sub frmWELCOME_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load Me.Location = New Point(270, 210) Timer1.Enabled = True End Sub Private Sub Timer1_Tick(ByVal sender As Object, ByVal e As System.EventArgs) Handles Timer1.Tick Timer1.Enabled = False Dim frm As New frmSelect frm.Show() Me.Visible = False End Sub Private Sub btnSkip_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSkip.Click Timer1.Enabled = False Dim frm As New frmSelect frm.Show() Me.Visible = False End Sub End Class This is the code of Select Form: Public Class frmSelect Private Sub btnCustomer_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCustomer.Click Dim frm As New frmCustomer frm.Show() Me.Visible = False End Sub Private Sub btnStaff_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnStaff.Click Dim frm As New frmStaff frm.Show() Me.Visible = False End Sub Private Sub btnExit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnExit.Click End End Sub Private Sub frmSelect_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load Me.Location = New Point(390, 250) End Sub End Class