Hiding Tabs

Hi There,

I wish to use one of our portals purely as a forum (no tickets and no solutions).  I am using the azure theme (with some modifications) although I am not able to hide the Ticket tab or the Solutions tab.

I saw an earlier post about adding the following code to my stylesheet, however, this doesn't work at all.

#header-tabs a:nth-child(4){
display:none;
}

.footer-links a:nth-child(4){
display:none;
}

Any ideas?