[l2h] enumerated lists

[sherry pan]

Hi,

I tried to get a list like this,

1 this is the first line
  1.1 sub first line
  1.2 sub second line
2 this is the second line
  2.1 blah blah

by the command

\renewcommand{\theenumi}{\arabic{enumi}}
\renewcommand{\labelenumi}{\theenumi.}
\renewcommand{\theenumii}{\theenumi.{\arabic{enumii}}}
\renewcommand{\labelenumii}{\theenumii}

But doen't work. How to do this?

Thanks

Sherri