Trying to keep my cool with configure.php

Ok, I just read the article about it being a good idea to rename your admin directory for security reasons (it's https://www.zen-cart.com/tutorials/index.php?article=73) I tried it, it didn't work. I went back to using my old configure.php backup files, renamed the directory back to admin and now my cart won't come up -- system setup required. I'm looking at my configure.php and it appears to be correct. I'm kind of freaking out because I've put a ton of hours into this cart and hope I didn't do something dumb. Please help me... I'll probably be up all night trying to figure this out so anyone who's up late I'd really appreciate some help. Thanx

Sorry guys..... I was panicking a bit and the ole brain wasn't working. It was a typo and problem seems to have resolved itself.

Also DL the SysCheck and Debug add-on's ... they help a lot with the new stuff :) Remember to backup.