Perhaps with the Hal representative but the Kate and Paul Neospeech voices work fine with my UltraHal.
Computer crashed recently and had to reinstall everything including Hal. The online activation process worked perfectly. Installed / copied the Neospeech Kate & Paul to the appripriate directories, started Hal, selected the Kate voice and it worked without incident.
I thought the problem was with the Representative not necessarily with the UltraHal program.