Hi xgambler,
We are currently experiencing technical difficulties on the system, which are causing a temporary login problem for webmasters (so I don’t think it is specific to the length of your password but is happening across the board).
Our tech department is looking into it and we should have the issue resolved shortly.
Please let me know if there is anything I can assist you with in the meantime and I’ll be happy to help 
I will let you know when everything is back to normal.
Thanks, in advance for your patience.
Nic.