It looks like you haven't done anything giagantichash, you need to add the 777coin signature from OP and also the personal message. Did you think he would pay you for nothing.
When you have done that post your status, bitcoin address and current post count. That's it, easy
Edit. Has anyone else found their personal message gone like me, now when I try to put it back it won't let me put in the full message, have they changed size limit?
I have the same problem too, last minute ago i've been trying to change my personal message just like you. thts why i only put without the rest of the word. idk if it'll gonna pay or not