Customers Can't Log In

I've Emailed more than once FTP / cPanel login in details, as well as Open Cart login details, but somehow I Haven't seen replies to those Emails. The annual conference of my friends is coming up in less than 3 months. I want to be responsible by having it where conference attenders can log into their accounts! The test customer accounts of my friend Marilee and I, won't allow us to log in. This truly appears to be a Bug. I spent a decent amount of time editing the Open Cart software, and I don't want to start over with other cart software!

Okay, fine .. now we know the story.
But what do you want from us??

I tested logging in for the first time in a few weeks, and it let me login as a customer! I have no clue as to what the issue was a few weeks ago.