It's best to send the person a PM to make sure the question is seen.
For those who have not read the new BP for Dummies book by OCBF, this is the simplest way to send a Private Message (PM):
1. click on the poster's name
2. click on the 'send a private message' line of the drop-down options
3. put something in the title line, type your message in the larger message box, and then click the 'submit message' box below the message box