Level 2 menu disappears

I'm trying to create a two level vertical menu using CSS Menu Writer. Everything has worked fine but when I move the cursor from the level-1 menu item to select one of its level-2 sub-items, the level-2 items disappear. Can you tell me what I have done wrong?

See "Business Fitness" menu item at fitness3.htm

Hi CGW

The way it is at the moment, you would need a give the Level-1 menu a left position of 202px to prevent mousing over a gap and losing the level-1 items.

ul#cssmw ul.level-1 {
left: 202px;
}

This is so that the level-1 items sit immediately adjacent to the level-0 menu with no gaps between.

There are chunks of css that are remarked out, so if you change those again you may have to adjust the positioning again.

Many thanks. So simple.