The ftp server mentioned above is configured to "list only" permission for anonymous logins!
You need at least "read' permission account to be able to get this file!
Anyway, I found the following forum post:
Someone is saying: "Cisco WAAS has vWAAS for Virtual appliance, vWAAS is not available for a
download from CCO. Please contact your Cisco Account team if you would like
to run vWAAS in your network."
So, we only hope for one of three choices here:
1. Someone who is having this software, and is generous enough to share it with us.
2. Someone who could contact his cisco account team and ask for it.
3. Someone get in contact with the one who is in charge of the above ftp server, and ask him if he could let us in to download it.