Replying to Online when im not

i recently tried sending one of my friends a lengthy explanation about mounting, ski construction, and basics of skis.

i clicked on his name in the upper left hand corner of the screen where it says messages, it opened a new window and i read his message. i typed this really long reply that took me like a half hour to write. It explained everything he wanted to know. when i finishes typing it, i hit the "reply" button and it did this...

it too me to a blank page that said "geusts cannot view a members profile"

what the fuck!?!?!

if i wasnt logged in then how could i see that i had a message, read it, and then reply to it?

how is this possible? i just wrote this awesome page and it didnt send. not only did he not get it, i lost all of what i wrote.

what the hell