As Kryten the kooky android in Red Dwarf, Robert Llewellyn was a hoot. As a live comic performing his own material, he was not half as much fun.

Llewellyn stood at a lectern and ran through a slideshow of a spoof software package called Woman Wizard.

Based on the idea that men and women use "different operating systems", Woman Wizard was for blokes who needed help understanding their wives and girlfriends.

Llewellyn joked he gave his software a particularly thorough user test, courtesy of his mate from Red Dwarf, Craig Charles.

Bloke was the standard setting for the likes of Craig - less roguish users could choose a slightly more advanced setting called Arty Bloke.

In Llewellyn's universe, the opposite sex was well named.

Men were from Mars and women were from somewhere far less straightforward.

Woman Wizard asked a series of leading questions, offering a menu of options and a virtual wife who responded on screen to show how the chosen approach might go down in real life.

When Llewellyn chose particularly unwise options - small misjudgements like asking one's wife if she is holding the map the right way up when navigating from the passenger seat or "accidentally sleeping with another woman" - the software signalled a "fatal system error" and insisted he restarted his computer.

Woman Wizard was a clever way of looking at a well-thumbed topic.

We all know men who relate better to machines than to people. But this show was overlong and Llewellyn did not execute it with enough wit or sparkle.

Indeed, his humble support act, Alex Horne, seemed to possess a more active funny bone - albeit heavily reliant on puns.