hbTAPI Monitor Media Modes ERROR

Question

Hi there folks,

I'm using the hbTapi Delphi7 Components, and I need to set MonitorMedia.Active in a TAPI call so I can detect the type of the connection. Problem is that when I say:

wTpCall.MonitorMedia.Active := true;

I'm getting an error: "Operation not supported by underlying service provider"... Why's that? I have installed all the default TSPs. What should I do to? Which TSP supports MonitorMedia? Or, it have to do with my modem? Or what?

Any help will be highly appreciated!

Thanks for your time, Reinier