Passing query string causes 404

Working on an ad banner to pass a contact info (name, email, phone) to a contact form on my website. The query string is formatted correctly (?name=jonathan&email=...) and when it lands on the page I get a 404 instead of any results. Any one else run into this?

test: http://grommelage.com/realty/test/contactform_v1.html

landing page: http://www.semprevivoproperties.com/003-2/

query string: http://www.semprevivoproperties.com/003-2/?name=jonathan&email=email@email.com&phone=8181234567

Please help. :-/

Hi Rob, I tested the query string in the preview window and it populated the form just fine. Is it something happening with how Wordpress operates?

Unfortunately the error is still happening after change the template over to Twenty Ten, and again the error occurs when all the plugins are disabled with the exception of GF. I've even tried changing template and turning off all plugins except GF.

Issue remains.

There appear to be 2 .htaccess files present. One directly in the root:

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>

# END WordPress

And this is in the wp2/ directory, which is where the website resides:

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /wp2/
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /wp2/index.php [L]
</IfModule>

# END WordPress

It was indeed the "name" causing the 404 error. Great catch, Chris. Thanks everyone!

This works: http://www.semprevivoproperties.com/003-2/?fullname=jonathan&email=email%40email.com&phone=8181111111