Modules & VBA :: Setting Focus To Non Default Instance Of A Form

How to set focus to a non Default instance of a form.

Environment
A2007 ADP Project
Document Window Option - Tabbed Documents
MS SQL 2012 Express DB
Windows 7 64 Bit

I using Allen Browne's method to open more that one version of form, storing each form object in a collection declared in a module. No problem there.

Now I'm trying to add a command button on an form to set focus to one of these non-default instances already open.

The form I am trying to set focus to has a the following related properties

Default View: Split Form
Pop-up: No
Modal: No

The form that has the command button on it is of the same type.

Here is the code I've tried:

'Code on Calling Form
Private Sub cmdProjectList_Click()
Dim FunctionResult As Boolean

If AppForms.GoToForm("ProjectList") = False Then
AppForms.Load_ProjectList

[Code] .....

The code compiles and executes with seemingly no problems. It finds the form loaded, then cycles though and finds the form in Forms but the SetFocus call seems to do nothing. When I run the code against a defualt instance ( one not opened using Allen Browne's method) it works fine and sets focus to it as expected.