Re: BBpress not sharing login details
First thing that I had to do was delete all cookies and login to BuddyPress fresh.
Things to double check:
1.) You’ve correctly added the keys in both config files.
2.) You’ve installed and correctly configured both necessary plugins, one on each side.
3.) Check the names of your cookies in Firefox and make sure the wordpress_ cookies all have the same string of text behind them. If not, your keys in your config files are wrong.
4.) You’ve modified both config files with all the little extra things they need done to them.