Been trying to make the multi-city booking option on Virgin's web site work, but have been failing.

When I click on the multi-city link on the main reservations, it takes me to a page where I have to select one-way or round-trip, no multi-city option.

Anyone else have this problem? Am I doing something wrong perhaps? All I want is a stopover in London on my Asia-London-USA booking.

Thanks,
Sankaps.