as you see in the attatched image, I am getting alot of spamming registration , I using Mollom module, honeypot module, captcha , even with the three running there is still alot of spamming registration .. Thanks alot .

https://fbcdn-sphotos-e-a.akamaihd.net/hphotos-ak-xpa1/v/t1.0-9/12654660...

How to investigate , or where should i start looking , and how do they register?