[Htmlvalidator-help] Why SGML parser doesn't work? :(

[cover <co...@gm...>]

Hi, i use gentoo with firefox 2.0.0.1 and I've installed this gorgeous
add-on (0.8.3.4), but I've a problem... I've set serial to have both SGML
and Tidy
But the SGML doesn't work, I've tried with www.google.it and this is the
result from the SGML:
http://img221.imageshack.us/my.php?image=snapshot3as9.png
So I checked with the validator.w3.org and the result is Result: Failed
validation, 49 errors
Have I to install or set something?
Help me :(
Thanks