You must fill out the account and password fields to log in to your account!
okay just logged in... so far at server select.
solution?
opened CoH via doubleclicking the program from the list of harddrive contents, and By Not using the NCSoft Launcher.
Which is something i've had to do alot recently, as a few days ago the NCSoft Launcher started being funny, and only opening CoH long enough for the Program to list as running(icon appears in the sidebar/Dock), ... before CoH would unexpectedly .... not open (thereby disappearing from the Dock (mac))
ive had this issue a few times, all it requires is a restart of the game and it usually cleares it up

Had this just hit me and a simple restart of the game fixed it. They wont keep me from my PD pack!
@Damz Find me on the global channel Union Chat. One of the best "chat channels" ingame!
Exit the game and restart, a little search fu and this issue would have popped up.
H: Blaster 50, Defender 50, Tank 50, Scrapper 50, Controller 50, PB 50, WS 50
V: Brute 50, Corruptor 50, MM 50, Dominator 50, Stalker 50, AW 50, AS 50
Top 4: Controller, Brute, Scrapper, Corruptor
Bottom 4: (Peacebringer) way below everything else, Mastermind, Dominator, Blaster
CoH in WQHD

" You must fill out the account and password fields to log in to your account!"
is the message i get upon attempting to log into my account -.-
on a side note... this was found after the game froze repeatedly, force quitting being the only way i could try to get back into the game.
I thought the game freezing might be limited to my brute Dog Mode on Virtue, so switched to my tanker, I had the game in window mode for the brute, but kept it in full screen for the tanker... the game didnt freeze up for the tanker, well it didnt freeze up after 20 seconds or so like it was for the brute...
Attempting to relog(the successful times) incurred the "Your account is logged in" message.
After the game froze for my tank, i got the " You must fill out the account and password fields to log in to your account!" message, whilst having the named fields filled in mind you >.<
apologies if my post is not to standard.