VS 2008 Load A 2 Forms From FrmMainForm?

When I load a 2 forms from frmMainForm I use:

frmBookingForm.MdiParent = Me
frmBookingForm.Show()
frmQuickView.MdiParent = Me
frmQuickView.Show()

So no matter which form I click that form always comes to the front.

When I load a form from frmQuickView I use :

' Check if Booking Form Already Open
If My.Application.IsFormOpen("frmBookingForm") Then
frmBookingForm.BringToFront()
Else
frmBookingForm.Show(MdiParent)
End If

The first part of the IF statement is ok, the problem I have is with the second. No matter what I try, frmBookingForm always stays at the front and all other forms remain behind it. I tried it without the MdiParent in the brackets and when ever I clicked on a form frmBookingForm went into the Taskbar.