ffdshow troubles

[mailed]

I've just bought your excellent Grapheditplus application. Unfortunately I've already come into a problem: while attempting to load a graph, made with the straight Graphedit application, I got this error:
80050154: Interfaccia non supportata (Italian for: unsupported interface) - REGDB_E_CLASSNOT REG
This may be probably related to the fact that this graph uses the "ffdshow video decoder"?
In fact, if I try to make a graph with grapheditplus from scratch and I try to add the "ffdshow video decoder" i get an error:
"Error adding filter" -> "Cast specificato non valido" (Italian for: specified cast not valid").
The ffdshow video decoder is in the VistaCodecPack, file ffdshow.ax, CLSID {04FE9017-F873-410E-871E-AB91661A4EF7}.
I'm also attaching the GRF file not loading in Grapheditplus and a pdf file with its representation.
I have a Vista Home Premium OS on a Asus G1S laptop.
I DO need to open that file in grapheditplus as I need the correspondent code: can you give me any help?

[Dee Mon]

When I installed ffdshow today, it showed list of applications where it should work and suggested refusing to work in all others. First time I disabled this option and it worked fine. Now I've reinstalled it with that option turned on. And it began to return the same error on insert.
So I'm almost sure that the problem is with this option - it checks what application invokes it and rejects if that app is not from the list of allowed applications.
You can find this option in "ffdshow video decoder configuration" / "DirectShow control" / "Use ffdshow only in..".

I guess you can find a way to disable this option from your application.