Ok so Here is an example of my UserForm code as was originally...
	' Apply introduction as to what is included
    Dim oCCA As ContentControl
    Dim oCCB As ContentControl
    Set oCCA = ActiveDocument.SelectContentControlsByTitle("ccINTROACTION1").Item(1)
    Set oCCB = ActiveDocument.SelectContentControlsByTitle("ccINTROACTION2").Item(1)
    Select Case True
        'Paper Version
        Case chbTR And chbR185 And Not chbAccounts
            Set oTmp = Templates("C:\users\%username%\%appdata%\Roaming\Microsoft\Templates\Building Blocks.dotm")
            oTmp.BuildingBlockEntries("bbTRONLY1").Insert Where:=oCCA.Range, RichText:=True
            oTmp.BuildingBlockEntries("bbPPRTRR185").Insert Where:=oCCB.Range, RichText:=True
        Case chbTR And chbAccounts And Not chbR185
            Set oTmp = Templates("C:\users\%username%\%appdata%\Roaming\Microsoft\Templates\Building Blocks.dotm")
            oTmp.BuildingBlockEntries("bbTRACCOUNTS1").Insert Where:=oCCA.Range, RichText:=True
            oTmp.BuildingBlockEntries("bbPPRTRACCOUNTS").Insert Where:=oCCB.Range, RichText:=True
        Case chbTR And chbR185 And chbAccounts
            Set oTmp = Templates("C:\users\%username%\%appdata%\Roaming\Microsoft\Templates\Building Blocks.dotm")
            oTmp.BuildingBlockEntries("bbTRACCOUNTS1").Insert Where:=oCCA.Range, RichText:=True
            oTmp.BuildingBlockEntries("bbPPRTRACCOUNTSR185").Insert Where:=oCCB.Range, RichText:=True
        Case chbTR And Not chbR185 And Not chbAccounts
            Set oTmp = Templates("C:\users\%username%\%appdata%\Roaming\Microsoft\Templates\Building Blocks.dotm")
            oTmp.BuildingBlockEntries("bbTRONLY1").Insert Where:=oCCA.Range, RichText:=True
            oTmp.BuildingBlockEntries("bbPPRTRONLY").Insert Where:=oCCB.Range, RichText:=True
        'Electronic Version
        Case Not chbTR And chbR185 And Not chbAccounts
            Set oTmp = Templates("C:\users\%username%\%appdata%\Roaming\Microsoft\Templates\Building Blocks.dotm")
            oTmp.BuildingBlockEntries("bbTRONLY1").Insert Where:=oCCA.Range, RichText:=True
            oTmp.BuildingBlockEntries("bbTRR185").Insert Where:=oCCB.Range, RichText:=True
        Case Not chbTR And chbAccounts And Not chbR185
            Set oTmp = Templates("C:\users\%username%\%appdata%\Roaming\Microsoft\Templates\Building Blocks.dotm")
            oTmp.BuildingBlockEntries("bbTRACCOUNTS1").Insert Where:=oCCA.Range, RichText:=True
            oTmp.BuildingBlockEntries("bbTRACCOUNTS2").Insert Where:=oCCB.Range, RichText:=True
        Case Not chbTR And chbR185 And chbAccounts
            Set oTmp = Templates("C:\users\%username%\%appdata%\Roaming\Microsoft\Templates\Building Blocks.dotm")
            oTmp.BuildingBlockEntries("bbTRACCOUNTS1").Insert Where:=oCCA.Range, RichText:=True
            oTmp.BuildingBlockEntries("bbTRACCOUNTSR185").Insert Where:=oCCB.Range, RichText:=True
        Case Not chbTR And Not chbR185 And Not chbAccounts
            Application.Templates.LoadBuildingBlocks
            Set oTmp = Templates("C:\users\%username%\%appdata%\Roaming\Microsoft\Templates\Building Blocks.dotm")
            oTmp.BuildingBlockEntries("bbTRONLY1").Insert Where:=oCCA.Range, RichText:=True
            oTmp.BuildingBlockEntries("bbTRONLY2").Insert Where:=oCCB.Range, RichText:=True
        
    End Select
 
I have tried all of the following, none of which have worked:
1. I have tried having the Building Blocks file in the StartUp folder (with the file enabled as an Add-In in the Options) obviously I changed the file path to pull from the StartUp folder instead of Templates.
2. I have tried Application.Templates.LoadBuildingBlocks.
3. I have tried 
	Dim m_oTmp as Template
If m_oTmp Is Nothing Then
    For Each m_oTmp In Templates
        If UCase(m_oTmp.Name) = "BUILDINGBLOCKS.DOTM" Then Exit For
    Next m_oTmp
End If
 
With this coded to happen on the opening of a new document
And changed my code to 
	Case chbTR And chbR185 And Not chbAccounts
    m_oTmp.BuildingBlockEntries("bbTRONLY1").Insert Where:=oCCA.Range, RichText:=True
    m_oTmp.BuildingBlockEntries("bbPPRTRR185").Insert Where:=oCCB.Range, RichText:=True
 
4. I realised that my UserForm initialises on Document_New and figured that it was maybe opening before the Building Blocks had loaded so I changed it so that the UserForm was loaded manually (I have a UI Ribbon button) after the file opened.
5. I know that the Building Blocks are never loaded until you perform an action which loads them (such as using the insert building blocks function) or you tell them to load; I tried opening my file, inserting a building block (from the organizer) and then running the UserForm.
I'm assuming that, if my building blocks file is visible in the project pane then the file is loaded and should be able to be used (even though, when the actual file is not open, it will say unable to view) - is that correct? Even when the file is there in the project pane it still won't call my building blocks; I get runtime error 5941.
Please can someone tell me what I am missing?