[Very Urgent] Registration activated bug

Hi,
i have installed SEF Advance. I have enable the confirm link mail. If a new user registred, and click on confirm link in the mail, he received, the account correct activated and he see the confirm page "your account is correct activated...". But, if from this page this user login with username and password, he see an "page not found" error message. Note that:

1) If the user refresh page, or go to home, and login, all work right;
2) if i disabled the SEF ADV i see not this problem

HELP ME...  THANK!

PLEASE HELP ME... Is so urgent! Thank! Another webmaster have my some problem?

I haven't heard about this. Please contact me on mail with the link to your registration page.

Yes Saka, very thank for your help. I provide now, send u this link. THANKS!!!

Archimede

SAKA I have my link send u. Can u help me? Is so urgent, i receive visitor's mail about this bug! Please... Very thank!

WITH NEW VERSION ALL WORK PERFECT.

SAKA, YOUR CUSTOMER SERVICE IS SIMPLY FANTASTIC!