Word 2007 and error 430

[arno]

Hi,

I am experiencing a rather exotic problem in Word 2007 on Windows
Vista (Extended Home Edition? Forgot)

I have a global template that offers integration with a 3rd party
database app.

In the global template, there is a refence to its type library, and I
can happily do

Dim x = MyApplicationX

However,

Set x = New MyApplicationX

or

Set x = CreateObject("MyApplicationX")

will fail with Error 430

I have set all security options in Word to Low.

When I create a stand-alone VBScript file,

Dim x
Set x = CreateObject("MyApplicationX")

will happily talk to MyApplicationX.

Any pointers? Is there some additional layer of security in Word 2007?

tia
arno