Failed authentication... Can't log in

I have been off of honorbuddy for about a month now. I have tried to log in to Honorbuddy using version i get Honorbuddy_2.0.0.5740 this :

[2:07:51 PM:425] Logging in...
[2:07:52 PM:314] Buddy Sessions: 0/0
-----
Shared Sessions: 1/1
[2:07:53 PM:796] -------------------------------
[2:07:53 PM:796] You have not selected a valid instance of WoW to attach to!
[2:07:53 PM:796] Please restart Honorbuddy and choose a valid instance of WoW to use Honorbuddy with!
[2:07:53 PM:796] This version of Honorbuddy only supports WoW Build #15595
[2:07:53 PM:796] You are currently on build #0
[2:07:53 PM:796] -------------------------------
[2:07:55 PM:046] Honorbuddy is up-to-date


So u downloaded version Honorbuddy 2.5.6316.470 i get this:

[20:24:09.755 N] Honorbuddy v2.5.6316.470 started.
[20:24:12.258 N] Logging in...
[20:24:13.026 N] Buddy Sessions: 0/0
-----
Shared Sessions: 0/0
Invalid Account Details
[20:24:13.236 N] Authentication failed!

Tony, any ideas? I am a long time honorbuddy user so i don't use a key, my log in and password is used. Is the password in the program case-sensitive? I am able to log in to here so password should nt be the problem.