I would guess you have another wall selected already. The other options are only available when starting a new wall.
If you just wanted to edit an existing wall, (for example convert it to a curved wall, or add another node,) firstly make sure the wall isn't currently grouped, select the wall on plan, then click on its reference (thick) line. A little pet-pallette will pop up where you can choose the different editing options.
Hope that helps!