Cepstral voices not heard during call

Mar 17, 2009 at 7:10 PM
I've installed some 8kbps voices from Cepstral and while they play fine within CallButler during a call they voices are not heard. If I use the default "Microsoft Sam" voice it plays fine during the call. Is there something that needs to be done to enable the Cepstral voices to work during a call?