First off What is the actual problem is it the client isn't connecting or is there a problem with authentication.
Here are the steps I would take to troubleshoot your problems.
First change your Authentication to using local user accounts on your PIX temporarily or set it up to fallback to the pix for authentication. Then create an identical user account on the pix with a different password try to login using the first password on your server if no go then try using the second password. If it connects then you know your vpn setup is right just your aaa is haveing a problem.
crypto map outside_map client authentication inside local
aaa-server LOCAL protocol local
username someone password somewhere
PS, Turn you logging setting in your vpn client to high for isakmp ipsec to discovery problems with your actual vpn configuration.
We have configured the outside and inside Interface with official ipv6 adresses, set a default route on outside Interface to our router, we also have definied a rule , which also gets hits, to permit tcp from inside Interface to any6.
In Syslog I also se...