TB recaptcha module not working on contact form ?

[cdwebman]

I installed the module from TB recaptcha V1.2.0 

But it seems it doesn't work on my contact form : 
I don't see any recaptcha puzzle, or "i am not a robot" text" 
but when i submit the contact form, i get the error message :

1. Your captcha was wrong. Please try again.

The module does work : on the Admin, i see the recaptcha, 
and i how to check it, of solve the "puzzle"

In the Admin module : when i change the contact form by "Advanced settings"
and save it, i get these error messages : 
 

1. The attribute "id" with value "loginCaptcha" is missing from the login captcha placeholder
2. The attribute "class" with value "login-captcha-hideme" is missing from the login captcha placeholder
3. The attribute "id" with value "createCaptcha" is missing from the create captcha placeholder
4. The attribute "class" with value "create-captcha-hideme" is missing from the create captcha placeholder
5. The attribute "id" with value "passwordCaptcha" is missing from the password captcha placeholder
6. The attribute "class" with value "password-captcha-hideme" is missing from the password captcha placeholder
7. The attribute "id" with value "contactCaptcha" is missing from the contact captcha placeholder
8. The attribute "class" with value "contact-captcha-hideme" is missing from the contact captcha placeholder

I use the Panda Theme, and maybe it's not compatible with this reCaptcha module from TB ?