IK spline handle problem

I'm working through Learning maya 5. and i have to create an IK spline curve for a series of joints. Trouble is when i select Skeleton->IK spline handle tool, and I use the LMB to click a start point nothing happens.

I'm working in the side view. I'll appreciate a solution please.

Thnx.

you're almost there, you just need to click on the end joint after that. A helpful hint is always read the helpline down at the bottom if you're not getting the tool to work, it will say what step you need to do at what time.
good luck!