Im having the same problem with the collection file, it doesnt work, the icons are all greyed out and when I click on it I cant place it on the lot, because its just not there.
ETA: I just found out that the collection doesnt work with BV, so thats whats wrong with mine. and it you have BV that would be the problem with yours too.
EDIT AGAIN: I just found a mailbox and trash can over at Sim a little dream alot, its not a collection, but it has been updated for BV.
http://daydream.etowns.net/