Yeah, you need to include the file classes/class_database.php.

omg. Now I'm back to

Could not connect to database, the following error has occurred:
SQLSTATE[HY000] [2005] Unknown MySQL server host 'DBHOST' (1)

umm what does your functions.php and config.php file look like? I got rid of these constants for you as they aint supposed to show up anymore.

I just need to know what to add to my scripts to make users auto login to the forum when they log in to the site. I fixed whatever error I had and thought I had it working to do this but it doesn't log me in the forum when I log into the main site.

Well the functions_forums.php are what you need of course. You may also look into the new lines I added for register.php and login.php from Mys v1.3.1, since these are what helps new users log into their forum account after registration or logging into the main site.

My site is all messed up now. I keep trying to register an alt and it inserts into db but won't let them log in.

It's something with the cookies. I just cleared mine and now I can't log in as myself. It says I do but then it takes me to the log in screen.

umm sigh... Post your register.php and login.php then, I will rewrite the codes for you.

It's too late.... I had to reinstall everything and lost everything.

Oh I am sorry about that, but I really dont understand why you could have messed up your site. The only changes you made to your old scripts were register.php, login.php and functions.php, correct? If so, just post them and I will get them to work for you. Theres no need to start over. Well if you've followed the upgrade procedure and replaced all your old files by the new files, then its indeed over...

It's telling me I already leveled up adopts when I haven't.