Top_left & top_right

How can I change top_left and top_right for to make them adapt all you are afraid fluid?
I experienced so but it not nothing happens.

#top_left {

  /* padding: 15px; */

  width: 100%;

}

#top_right {

  /* padding: 15px 15px 15px 0px; */

  width: 100%;

}

td.left div.moduletable h2, td.right div.moduletable h2  {

	text-transform: capitalize;

}

#top_left ul, #top_right ul {

  padding-left: 40px;

Also change 220px of defaul with 280px (for example) does not change nothing.
Is absolutely ugly to see the two blocks in this manner (see attached file). Thanks