Parent and child menu horizontal and vertical?

[JiiPee]

I have a very simple text navigation and I would like to have parent menu going horizontal at the top and child menu vertical in the sidebar.
In sidebar I have placed {menu template='cssmenu.tpl' start_level='2' collapse='1'} and child navigation indeed show up in that sidebar but it also goes horizontal.

I tried styling ul#primary-nav li li element with float:none but it dont work. Is there any easy way how to make own styling for child menu?

[JiiPee]

Got it working, just used this {menu start_level='2' collapse='1'} and I could style it with separate css.