Can't load google analytics - 1.5.5.1

When I try to enter my google analytics code in the server section of admin, I get taken to a page that says "The page you requested cannot be found." The url says: http://printedbusinessenvelopes.com/adm ... b74b17924e

The ga code is not inserted. I've tried this several times and had someone else try on a different pc. I reloaded the admin files to see if I had a bad upload.

Any clues? Is the a way to enter the ga code manually in a php or tpl file?

Hi,
try this way
Conect FTP, go to catalog/view/theme/YOUR_THEME/template/common
open header.tpl and find <?php echo $google_analytics; ?>. Replace it by your GA CODE, save it and upload again

regards