Spring Fling XXVI: April 17 & 18, 2010 Van Nuys CA -FABO roll call/meetup

Did any one else get there registration sent back to them? I sent it to where it said to on the flyer.

PO BOX 3127
Granada Hlls, CA. 91344


I got it back and it said unclamed return to sender. Whats up with that?