to work the PM thing, just clisk on the littel pop up window. If you computer doesn't allow pop ups, clisk on cancel to open in new window. Or, when signed in , at the top of the screen, there's a little grey box and click on Private messages.
TO read them once in your PM section, just click on whichever oe you want to read, but not the person's name... I hope this helps...
TO send something back, click reply.