Signature help

I am confused on my auto signature. If I put the code into my message it comes out fine, but if I let it put it in for me it just comes out as code when I preview it. I will insert the code below...

[c] Diess Darkservant
Heretic of the 53rd Skull
Worshiper of Innoruuk
And Keeper of Niasa en'Valrim[/c]

At the end is my autosignature that I set up in the control panel of this site...