Help! Crazy WSOD Problem on Submit when my custom module is on production server

Hi -

Thank you for reading this. I have over a million hours into this problem already. I would worship the ground you walk on if you can help me solve this problem.

I developed a module on a test server with php 5.1.4 and mysql 4.1.20. It worked great. I found a more reliable host and installed it there and now I get the White Screen of Death whenever I hit submit. When I log in, when I do a search, when I confirm my module choices - WSOD. If I go to the URL in the nav bar and hit enter, it loads. The new server is on php 5.2.5 and mysql 5.0.51a.

Here is what I've been able to ascertain: I have memory_limit at 128M, max execution time at 30, maximum packet size at 16M. The upgrade to mysql 5 seems to be producing some errors but I can deal with them because at least I know what they are.

I have no clue what CGI does or if it relates to the submit function but the old server has CGI/FastCGI and the new one just has CGI.

There is nothing in my error log. Although I don't know what a lot of the functions below do, I'm trying to make my new server configured like my old one. My php.ini looks like this:

memory_limit = 128M

register_globals 0
session.auto_start 0
mbstring.http_input pass
mbstring.http_output pass
mbstring.encoding_translation 0

error_reporting =6143
display_errors = On
post_max_size = 16M
upload_max_filesize = 10M
log_errors = On
magic_quotes_gpc = Off
max_execution_time = 30
max_input_time = -1
output_buffering = 0
register_argc_argv=Off
register_long_arrays=Off
track_errors = On
session.bug_compat_42 = Off
session.gc_divisor = 1000
session.hash_bits_per_character = 5

When I turn off my custom function, everything seems to work. When I reduce my custom function down to just the following:

 <?php
// $Id: mymod.module,v 1.0 1/12/08 

/** Settings form
* This module has no administrative settings
***
* Implementation of menus
*/

function mymod_menu($may_cache) {
	$items = array ();
	$items[] = array ('title' => t('Support Home'), 'path' => 'support', 'callback' => 'mymod_support', 'access' => TRUE);
	return $items;
}

Boom - I hit a white wall with every submit. I'm ready to commit hari kari. Please save me from this awful fate and, if you have any vague idea, share it with me!

Thanks --

Missy.