Unable to access the Live Demo

[starrouter]

Hello, I am new to Zimbra. I'm looking for an alternative to exchange for a small department where I work, about 20- users, that want to be able to share calendar information. Zimbra open source looks like it might fit the need. I am trying to register to try the live demo but am unable to get past the screen that requires me to enter the characters in an image. I've tried dozens of times and I know I must have gotten some of them right but am still unable to get past that screen. Are my eyes THAT bad ? !