CreateSubscription Error

I am trying to create an email subscription programmatically, so I first followed the BOL example which worked ok.
Later I tried to replace the fixed ExtensionParams array of the example with a call to the web service method GetExtensionSettings, where, for the desired delivery extension, a parameter array would first be dynamically filled with the required parameter names by the web service and then I would only have to supply the respective parameter values.
After that change, the call to the method CreateSubscription does not work, as it doesnt recognize a SendEmailToUserAlias=True parameter which is now also used for the call.
Why is that?Some properties returned by the GetExtensionSettings method are marked as
read-only and can not be passed back in during CreateSubscription calls.
--
-Daniel
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"vsiat" <vsiat@.discussions.microsoft.com> wrote in message
news:853377AF-B0DC-477A-AD28-9507DC2559D8@.microsoft.com...
> I am trying to create an email subscription programmatically, so I first
followed the BOL example which worked ok.
> Later I tried to replace the fixed ExtensionParams array of the example
with a call to the web service method GetExtensionSettings, where, for the
desired delivery extension, a parameter array would first be dynamically
filled with the required parameter names by the web service and then I would
only have to supply the respective parameter values.
> After that change, the call to the method CreateSubscription does not
work, as it doesnt recognize a SendEmailToUserAlias=True parameter which is
now also used for the call.
> Why is that?
>