Login button problem

I have read the many posts about this problem but I can find a solution.

The login is checking the fields i.e for correct field format and I have also made sure all the mandatory fields are there.  Actually I made all the fields non mandatory but that didn't help.

Happy to pay someone to fix it if someone is up to the challenge.  Alternatively, i was considering upgrading from 7.0 up to something better, happy to pay someone to do this if they are keen and able.  

 
Ok. But perhaps you need to actually explain the problem. You said you have read many posts about this problem. But what is this problem?

Sorry Deano, post should read, I can't find a solution.

Site is http://www.sponsosoapbox.com.au/join.php

After filling out the form and pressing the Join Now button it runs the process and checks to make sure the fields have the correct information, but after that it just stops dead in its tracks.  

I reverted to an earlier version of the site via a backup and the only thing that I can think that has changed is an upgrade on the server to a slightly higher version of PHP.  Went from 5.2.17 to 5.3.7.

I am actually keen to hire someone to upgrade to the latest version of Dolphin.  If you are interested in the work let me know a rough price for the work.  Only a few modules some I think you made. 

looks like there is an issue with the e-mail field after you enter one the join buttons stops responding if you leave the e-mail blank its ok

You forgot to put the function ForbidenEmailProvider() that i suppose you put there from spam related 100 posts. Search for it and put it in the correct file, otherwise edit the email filed and remove it from "Advance->Check" field.