cursor is not moving to mouse position in text boxes

 I'm opening the sub forms in panel on the main form. The cursor is not moving to mouse position in text boxes

This is the code to open the sub form in a panel on the main form :
Public Shared Sub ShowForm(form As RadForm, Optional FormType As Integer = 0)

        Dim i As Integer
        form.TopLevel = False
        frmMainMenu.rdpnlchild.Controls.Add(form)
        form.BringToFront()
        If FormType = 0 Then
            form.Show()
        ElseIf FormType = 1 Then
            form.ShowDialog()
        End If

    End Sub