[support] Td style not working

Hello, I've got a drupal 5.1 site where I'm trying to insert a table. In one cell, I've got a background set like this: <td style="background-image: url(http://www.imcpl.org/resources/images/subcategory_main.gif); background-repeat: repeat-y;"> When I save the page, rather than using that background for that cell, it instead shows this text: http://www.imcpl.org/resources/images/subcategory_main.gif); background-repeat: repeat-y;"> Is there a setting somewhere I need to change to get that to work? I'm using the input format of full html. - jody