Cathy, we had a serious problem recently with new members signing up so they could send PM spam to other members, so we had to make a change to the usergroup permissions. Now new members (junior members) cannot PM at all. The account promotes to Senior Member after 20 days and 20 posts, which will let you PM. You probably had PMs before, because we just changed the system a few days ago and the change was automatic for all members. You signed up 20 days ago today, so your account will switch over soon. The system updates every hour so it tracks it to exactly 20 days from when you signed up down to the time.
I'm sorry for the trouble
Darned spammers ruin it for the rest of us!