RC4, Captca and SPAM (yet again)

[ZatriX]

Hi, I've seen a lot of topics asking the same question, but no-one has come up with an answer it seems, so:

Why doesn't EasyCaptcha RC2 work?

Is there any changes in the code I can make to use a different captcha? (I use securityimages for the rest of the site and it works fine).

Thanks in advance