I have a similar scenario with the same OS version and it's working fine for me. The only thing that I can think of is that you have forgot to run the command "sysopt permit connection-ipsec". In that case you need to run it or allow the traffic through an inbound ACL applied on the outside interface.
Anyway, I have attached my own config, so you can compare and you might find the missing ring here.
Table of ContentsIntroductionVersion HistoryPossible Future
UpdatesDocuments PurposeNAT Operation in ASA 8.3+ SectionsRule Types
Network Object NATTwice NAT / Manual NATRule Types used per SectionNAT
Types used with Twice NAT / Manual NAT and Network Obje...
Table of Contents Introduction:This document describes details on how
NAT-T works. Background: ESP encrypts all critical information,
encapsulating the entire inner TCP/UDP datagram within an ESP header.
ESP is an IP protocol in the same sense that TCP an...