CB – This is not a valid email address

Hello to all,
Thank you in advance for any assistance. I use CB: 1.8 and Joomla: 1.5.26.
I got it installed well and begin to register it, but at the end of the registration process I receive an alert that says: “This is not a valid email address”. I’ve already tried various different e-mail addresses.
Additionally, the password field states that “Password and verification do not match…” however, they are correct.
I don’t want to reload CB and reinstall all its Plugin again, but even if it seems ridiculous, I will do it if needed.
Any alternatives and suggestions??

