[Plugin: Pie Register] No verification email is sent to the user – No redirection

On wordpress 2.9.2!
I’ve just downloaded today and installed this plugin on a new wordpress 2.9.2. But I am having a problem:
While registering, when I submit the form, I get a screen with a list of data in an array and I am not redirected to any page, and no email is sent to the person who registers:
Here is an example of what I get (url is https://www.domainname.com/wp-login.php?action=register)

Array
(
[user_login] => doridor
[user_email] => [email protected]
[firstname] => John
[lastname] => Smith
[pass1] => Smith03349
[pass2] => Smith03349
[captcha] => 72dce
[wp-submit] => Register
[user_pw] => Smith03349
)
Can somebody tell me how to solve this problem?
Thanks.