Ok I can't give many details here, but I promise that when it's finished, I will release it. I need some Samba help on a CENTOS server...let's just say it has a database on it

I have Samba all configured with users and a share as well as firewall access. On the Windows PC, when I go to access the share it comes up with the attached screen. No password works and I cant change the user. Is there a config file somewhere that can fix all this?