custom Dropdown

[Suchy]

I am having trouble with the border color of a dropdown. I want to have it green

 

IE 7

 

 

Firefox

 

 

In IE the border color does not work at all, in firefox it looks ok but when a selection is made the border of that is the default color.  What is wrong with my css ?

 

.dropdown_menu

{

width:580px;

padding: 2px 5px;

border: 1px solid #B8E0D7;

font: normal 1em Arial, Helvetica, sans-serif;

}