Problem logging in to admin, I get a blank page

[Gregg1009]

Script URL: http://www.havenzonesupport.com/helpdesk
Version of script: 2.0
Hosting company: GoDaddy
URL of phpinfo.php: http://www.havenzonesupport.com/helpdesk/admin/test.php
URL of session_test.php:
What terms did you try when SEARCHING for a solution: blank admin failure

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I have installed hesk a number of times in the past and it always works great. This time I wanted to really customize it so I bought the $30 version. I made changes to the header.inc.php and header.txt and footer.txt to customize the look of the script. Everything works great as always but now when I go to log into the admin section, if I enter the right password I just get a blank screen. I'm not sure what caused this. Any ideas?

Everything I added is just for the look of the site, except I did add a mysql look up to another db in there. But this problem still happens when I take that out.

[Gregg1009]

URL of phpinfo.php: http://www.havenzonesupport.com/helpdes ... hpinfo.php
URL of session_test.php: http://www.havenzonesupport.com/helpdes ... n_test.php

[Gregg1009]

I uploaded the admin_main.php file again and now when I go to log in it says "Your session has expired, please login using the form below."... any ideas?

[Gregg1009]

So I found out that it works fine when I use Firefox... and a simple mistake was not to clean out the cache and restart IE 8... now all works fine.