recaptcha not working - The string you entered for the image verification did not match what was displayed.

[xgiovio]

Hello, i don't know why the recaptcha doesn't work on my vbulletin 5 website.

http://www.xgiovio.com/forum/register

The first time i press the complete signup it doesn't nothing, the second time it display:
The string you entered for the image verification did not match what was displayed.

Anyone can help me? Thank you