You obviously have a wordpress.org blog, right? And you did not read the sticky post at the head of this forum prior to posting, right?
Then why are you continuing to post to this wordpress.COM CSS customization forum in another thread?
We do not provide support for any bloggers other than free hosted wordpress.com bloggers, and wordpress.org does not provide support for wordpress.com bloggers.
This is the correct forum for you to go to > http://wordpress.org/support/