If you'd read some documentation (second paragraph in the Chatterbox Information section), you'd have discovered that substituting an underscore for a space character will allow you to send a private message.

Your inability to discover this on your own leads me to two possible scenarios:

• The information for new users is not as easy to find as it should be.
• You're lazy and prone to overreaction.

I'll give you the benefit of the doubt and choose the former. Lots of things are apparently impossible, until you read the directions -- or ask someone more experienced for assistance.

For future information, the Perl Monks FAQ has quite a bit of user-contributed documentation. It's another good place to look for information.