I hate to tell you this ,but if Misskirstie has only made one posting on Rootschat she won't be able to use the PM system yet.
You need to have made 3 posting here to be able to do so.
See this from Berlin Bob on .....
http://www.rootschat.com/forum/index.php/topic,327529.0.html"Personal Messages (PM) are a private e-mail system within RootsChat.
You can use PMs to send personal data to other RootsChat members.
As the name suggests, this data is private and can only be seen by the recipient.
New members must make three postings before being allowed to use the PM facility.
In general, there is no limit to the number of PMs you may send or receive,
(although we do hope you will empty your Inbox and Outbox regularly).
If you are sending PMs to new members who have less than three posts you will receive an error message, that your limit, or allowed number has been reached.
(note that it says your limit, although it refers to the recipient )
Attachments are not allowed on PMs"
So MissKirstie,if you are getting this message then reply a couple more times to it and bingo-you two will be able to PM each other

Carol