[SOLVED] CS NeedsTeXFormat{LaTeX2e}

NeedsTeXFormat{LaTeX2e}
ProvidesClass{homework}[2011/08/31]

DeclareOption{10pt}{PassOptionsToClass{10pt}{article}}
DeclareOption{11pt}{PassOptionsToClass{11pt}{article}}
DeclareOption{12pt}{PassOptionsToClass{12pt}{article}}
ProcessOptions
LoadClass{article}

% Margin setting
RequirePackage[letterpaper,
top=1.8cm,
bottom=1.5cm,
left=1.8cm,
right=1.8cm,
includefoot,
includehead]{geometry}

% List spacing setup
setlength{topsep}{0pt}
setlength{partopsep}{0pt}
%setlength{itemsep}{0pt}
%setlength{parskip}{3mm}
%setlength{leftmargin}{8em}
%setlength{rightmargin}{0em}
setlength{listparindent}{0em}
%setlength{itemindent}{0em}
setlength{labelwidth}{leftmargin}
%setlength{labelsep}{1em}

ewcommand{hwnumber}[1]{defhwnumberdata{#1}}
defhwnumberdata{relax}
ewcommand{problemnumber}[1]{defproblemnumberdata{#1}}
defproblemnumberdata{relax}
renewcommand{author}[1]{defauthordata{#1}}
defauthordata{relax}
ewcommand{collaborators}[1]{defcollaboratorsdata{#1}}
defcollaboratorsdata{relax}

% Find the last page
RequirePackage{lastpage}

% Fancy headings
RequirePackage{fancyhdr}
pagestyle{fancyplain}

fancyhead[L]{small CS 332 Homework #hwnumberdata Problem #problemnumberdata \
textsl{Collaborators}: collaboratorsdata}
fancyhead[R]{small authordata \ }
fancyfoot[C]{small thepage of pageref{LastPage}}

RequirePackage{titlesec}
titleformat{subsection}{
ormalsizebfseries}{thesubsection}{.5em}{}
renewcommand{thesubsection}{alph{subsection})}