.remove jquery not working with IE7 and I6

.remove jquery not working with IE7 and I6

Hi, I am new to jquery. In my application I am using the j query code
 [code]
 $(".close").click( function()
 { $(this).parent().css('visibility', 'hidden') 
$(this).parent().remove() 
[/code] 
Using this when I remove the list item, it gets removed proeperly in FF and IE8 where as in IE6 and IE7 when i remove the list item, its creating a white space and the second item is sliding beneath the second one