How do I message another member?

[Heidi Neilson]

Hey BP Nation!  Total newbie question... How do I send private messages?  I was able to send one the other day, from someone's profile, that had a "contact me" link on it, but now any time I type someone's name in the "new message" window, it resets itself...

I see the note that I can only send messages to one user at a time until I upgrade, but does that actually mean I can only have one active message thread at any given time?  I figured it meant I couldn't address multiple users in one message.

Thanks for your help!