Multiboxing still allowed?

I previously multiboxed (about 5 months ago) and had no issues. I want to play LOTRO again and tried setting everything up today, but am only being allowed to login to one character now!!! The launcher is set up to run multiple instances. HELP!!!

I have logged in several accounts today, and no problem. So, question is, are you trying to open multiple instances of the launcher (not your accounts)? You can only do 1 launcher instance, however, if you do the option to leave it open, you can then log in each account from it. - Now, I'm assuming you're probably trying to launch multiple instances of the launcher, not accounts. So if that wasn't it, post what you're doing and trying and I'll try to duplicate it also.