Page not found? Brick wall in migration...

NOTE, THIS IS NOT LIVE--THE URLS WILL ONLY WORK IF YOU ADD THIS TO YOUR HOSTS FILE:
63.247.82.169 gallery.opalcat.com
(I'm also migrating to a new server so this is all extra frustrating. Public DNS for gallery.opalcat.com goes to the old server)

PHP info page: http://gallery.opalcat.com/gallery2/phpinfo.php

G2 URL (optional): gallery.opalcat.com/gallery2
G2 version: 2.1.1 core 1.1.0.1
G1 URL (optional): gallery.opalcat.com/g1
G1 version: v1.5.1-RC1
G1 character set:
PHP memory limit: buuuhhhh?
--
Gallery version = 2.1.1 core 1.1.0.1
PHP version = 4.3.9 apache2handler
Webserver = Apache/2.0.52 (CentOS)
Database = mysql 4.1.14-standard, lock.system=flock
Toolkits = ArchiveUpload, Exif, Getid3, Thumbnail, ImageMagick, SquareThumb
Acceleration = none, none
Operating system = Linux (CentOS) treefrog.fathom.org 2.6.9-34.EL #1 Wed Mar 8 00:07:35 CST 2006 i686
Default theme = matrix
Locale = en_US
Browser = Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.1.4322)

I'm doing the instructions from the Gallery2:migration page and I get to this step:
Go to site admin -> import gallery 1 (at the bottom).
This is the Select Gallery page
Enter g1 albums dir path (absolute filesystem path). (This is in your config.php for gallery1) Submit.

And when I click submit, I get the generic IE page not found page. Kind of prevents me from going any further. If I hit RELOAD it takes me to my main gallery page.

Oddly, I get the same thing when I click on "activate" or "deactivate" on any of the modules, HOWEVER the weird thing is that when I reload the module page, it registered my change (activate/deactivate).

I'm so confused

Thanks,

--Katherine