White page on register.php?do=addmember

Hi, I am new to the site and I'm trying to register but i keep getting a white screen after i press complete registration, Ive made sure that everything is correct but it doesn't work. Ive tried different browsers, clearing cache, and cookies, trying proxies, i even asked my friend to register but the same problem occurred. this is the info that I'm using:


User Name:
<nima158>

Password:
<*password*>

email address:
<********@hotmail.com>
(even tried gmail still didn't work)

Image Verification:
<6 Character verification code, entered case sensitive>

Recaptcha
<Entered captcha exactly as shown in the image>

What is the third letter of the English alphabet?
<C>

Did you come to sythe.org to scam other members?
<no>

Sign by writing your FULL NAME in the box below.
<Firstname><space><lastname>

Recovery Phrase
(tried with and without it)