Comply to coding standards, please.

Major problem was spacing. However, what is also bad is that you need to follow doxygen coding standards; also, the you should unset $help_text after you're done with it; also, the way you are hard-coding the headers is bad, you should use theme('page'... Remember to always use an indent of two space, no tabs, no trailing spaces, no spaces on blank lines. There should never be any tabs in your code. Also, after commas should be spaces. In fact, just run the coder module over your module and clean it up.

Ok, it's much, much better, but a couple of things still:

Spaces after comments, like such:

<?php
my_function_name($param1, $param2);
?>

When concatenating strings, leave no spaces between the dot and strings, but one space between the dot and everything else. For example:

<?php
$mystring = 'Start of string '. $var ."\n". t('My translatable text');
?>