wierd problem with logo.gif

I followed the instructions in the tutorial section to change the logo.gif, the template i am using (Sophy Blue-Grey) did not have a logo at all, so I followed those instructions so that I could add one. It does not show up. Here is what I did:

1. named my logo: logo.gif
2. uploaded it to includes/templates/sophybluegr/images/logo.gif

3. modified includes/languages/english/sophybluegr/header.php
define('HEADER_LOGO_IMAGE', 'logo.gif');

4. Checked includes/templates/sophybluegr/css/stylesheet.css
to verify the line was there:
#logo {float: left;}

I got nothing for my efforts. where am i going wrong?

Any1 have ideas as to why this is happening?

Are your permissions for the images file set to 755?

that was the problem, thank you very much!