Snipes ending on the quarter hour from 5-9pm, and especially on Sunday need a 30 second lead time.
Also your lead time was 4 seconds on that item. Thus only 1 free snipe for you:
http://www.auctionsniper.com/freeSnipes.aspx
Also you need to increase your lead time on the item you are sniping that ends exactly at 8pm. tonight.