Toolbar css

I have tried to change the background color for the toolbar without any success. I know I have to clear my cache whenever I change a source file of the editor, but this doesnt do the trick either.

The file I am modifying is "editor\skins\default\fck_editor.css"

and the propery I'm changing is

.TB_ToolbarSet, .TB_Expand, .TB_Collapse
{
/*background-color: #efefde; orignal colour*/
background-color: #e3e3e3;/* new colour*/

}

It must be something so simple I'm overlooking ...


forgot to mention i also tried to set the property :
//oFCKeditor other properties too ...//

oFCKeditor.SkinPath = "skins/default/"

oFCKeditor.Create();

to a non-existing path and that didn't have an effect either ... what am I missing ....