rocknbil - 4:50 pm on Feb 28, 2012 (gmt 0)
Are you using the FireFox extension FireBug? You can right click the element and see what is affecting it, your class selector was probably "working" and something else was overriding it.
If it's "just this instance" - a SINGLE instance on any given page - you can add an ID to it and access it that way, too.
Though a p is valid inside an li, block elements inside lists never made a lot of sense to me. :-)