I'm trying to put together a template file that when loaded into Word (2010) via startup, will add a custom tab to the ribbon with some shortcuts to open a selection of templates at a fixed location. I can't for the life of me work out how to get Word to actually open a file via a macro command.

The VBA script I'm trying to use is:

Sub OpenFile1()
Dim wdApp as Object
Set wdApp = CreateObject("Word.Application")  - Probably redundant, makes no difference
wdApp.Visible = True
wdApp.Documents.Open Filename:="Filepath+name"
End Sub

The CustomUI.xml code that I'm trying to call it with is:

<button id="button1" label="Open File" size="normal" imageMso="Image" onAction="OpenFile1" />

Any ideas what I'm doing wrong?

I'm trying to make this fairly portable so we can give it to a few people so they've got a quick & simple way of getting at the right set of templates.  It looks like it should be fairly easy, but I just get an "invalid property assignment" error.