There is a security setting in the AOL system that is needed to access password protected directories. You need to change the settings from anonymous login to "Prompt for username/password".
Once this change has been made, when you try to access the /log folder, your browser will display the username/password prompt and you can then login using your FTP credentials for the site.
For AOL Ver. 6.0, the settings are found at:
Settings > Preferences > Internet Properties
Once there, choose:
Security > Custom Level
and set it so that you will be prompted for a username and password when you try to access a password protected directory.