Facebook Game Leaderboards

I'm working on Leaderboards feature for my Facebook Game using Clay.io Plugin and FacebookComplete(authore : Lance Locke). But I face some difficulties inputting Facebook Username on Clayio.LeaderboardName while there was LoopIndex Expression after it.

here is an Image Link to explain more detail about my problem :

img849.imageshack.us/img849/9425/tyb1.png

On a side note, they won't get alerts that they were mentioned in the thread unless they have already posted in it. You may want to change the name and include clay.io in the title of this thread to get Austin's input.

Not Helping, -___-

but thanks 4 the advice anyway..