How to predict targets from a novel miRNA - (Oct/12/2011 )

Novel miRNAs listed in mirBase, e.g. hsa-miR-3613,etc, don't have targets predicted by the software. How to predict the targets like this. Many thanks for your help.

http://www.protocol-online.org/forums/topic/21115-comprehensive-list-of-microrna-target-database-and-softwares/