I'm just learning the basics of Sharepoint and I've set up a test instance of Sharepoint Foundation 2013 in a virtual machine running Windows Server 2012. (I followed http://social.technet.microsoft.com/wiki/contents/articles/15289.sharepoint-2013-creating-a-development-environment.aspx to set up my dev environment)
I set everything up and it appears to be working for the most part. I didn't like the default HTTP authentication that was used and decided that the first thing I'd try to do was set up Forms Based Authentication. Turns out this may have been a bit of a mistake, as it's now been a week and I still have no idea what I'm doing, so I'm finally asking for help.
I wanted the FBA to be compatible with the Active Directory system already in use, so I followed this tutorial: http://davidmsterling.blogspot.com.au/2013/05/setting-up-forms-based-authentication.html.
It all looked good, so I tested it out. I attempted to log in as Administrator, and I got the following error:
The server could not sign you in. Make sure your user name and password are correct, and then try again.
I tried logging on as YM\Administrator, same deal. I changed sAMAccountName in the configs to accountPrincipalName and tried firstname.lastname@example.org. Nothing. I downloaded a free program called LDAPAdmin and tested that all the LDAP details I'd entered were correct, and they were. I also tried changing the LDAP settings in the configs and got a different error, so it appears that it definitely is connecting to LDAP properly.
I followed this tutorial (http://msdn.microsoft.com/en-us/library/ff650307.aspx) to create a standalone ASP.Net application to test LDAP, using the exact same settings as I'd put in earlier in Web.config. It worked fine. Sharepoint still won't work. I tried changing my password, no luck. I made sure the user I was attempting to log in as had the correct permissions in Central Administration. Still no luck.
It seems like everything is working correctly but I just can't log in. I don't know what else to try, so I'm asking for help.
P.S. Sorry about one of the links not being functional, I don't have enough reputation to post more than 2 links yet.
EDIT: Link fixed as I now have sufficient reputation.