Registration Page Errors - not a valid email addre

Hello to all, I would appreciate your assistance.
CB: 1.8
Joomla: 1.5.26

Problem::
During the registration Process , everything seems to be working well, until after it is submitted.

No matter the email address it returns:: This is not a valid email address
Password Type Fields also state:: Password and verification do not match, please try again. (Yet they are correct)

Any suggestions??

I do not want to have to reload CB and all the Plugin again... (ridiculous!!!)
But, If i must I will.

Thanks for your help!

Wrina

upgrade to CB 1.8.1 please and retest.

also turn off Ajax email checking from cb configuration.

I have updated, turned of the ajax in the config... and still, I am not able to register members to the site.

The error messages, have not changed.
I am at a loss???

screenshot of error messages?

this is the error message: (It first appears in a separate popup window, once closed it takes you back to the registration page, and 'not applicable' is inserted in all fields).

Thanks for you help.

Thanks for your help. I figured it out.
I disabled the "CB Multi registration & hidden fields support" plugin, and it works fine now.