Change Default Avatar Gallery

Hello, I thought this should be a simple procedure, but it's just not working.
Trying to replace the default avatar image gallery. Found the file images/comprofiler/gallery/
I add other .gifs, but they do not load. Then I tried replacing the original files, but I got a 550 error from the FTP program. Even after logging into the servers file management, I was usable to delete. Tried setting permission to 777 and still nothing. Couldnt even delete the files.

Any clues?

Thanks!

Permissions issue - most likely with ownership of files/folder.

Solved-

Apparently the files were owned by 'apache'.

The other problem was that I could not change the permissions because I cannot log in as apache or root with the correct permissions.

Solution: in the SSH terminal, start with:
su -
password: (root password)

(this switches the user temporarily)

Once you have navigated to the images/comprofiler folder, run these commands:

chown R- username *
chgrp R- username *

where username is the name you have permissions with.
the R- changes the permissions of all the files located within that folder as well.

Finally, use the ls -al to list the files and make sure that the owner and group have been changed.