placement

I am relatively new to Drupal and am having a hard time trying to figure out how to place elements within a block.

I understand that the elements can be ordered in the administrative page, but one of my elements is still hidden.

Is there something in CSS that links to the block name in Drupal?

Okay, I'm developing a new site and about to hit my wits end on this. Using Drupal Version 6.16 and was using captcha 6.21 but have temporarily gone back to a beta 3 version of 2.0 since someone else had posted this "fixed" the problem. Returned back to 6.21 since my efforts were to no avail.