set font problem

[Luca Ferrari]

Hi,
I'm using GNU Emacs 22.1.1 (i486-pc-linux-gnu, GTK+ Version 2.12.0) on Linux 
and I'm having a few problems with the font/fontset. My .emacs file has the 
following line:
(set-frame-font "-*-Courier-bold-*-*-*-18-*-*-*-*-*-*-*")

but it does not work, and in fact each time emacs starts, the font is not the 
one I've selected. But if I manually select the above font from the Set 
Font/Fontset menu, I can see the font working. Any idea?

Thanks,
Luca