Editing header CSS but not working, Why?

Hi

I have edited the following

general.css

div.sys_main_logo {
position: relative;
z-index: 56;

background-color:#FFFFFF;

in templates\base\css\general.css, but this has had no effect. Could any please tell me why it is not working?

Thanks

Did you clear your cache folder or click "ALL" under "Clear Cache" on your Admin page?

Thank you patrick81 , that did it. I was clearing the cache in the browser but not via the admin.