As Adam mentioned, more detail on your setup would be helpful.
To change the priority of the routes, you would need to make the route that the VPN traffic should be taking more specific than the static route they are currently taking. For example, if the traffic is currently following a 10.0.0.0/8 route, you might configure a 10.0.1.0/24 route on the interface that you want the VPN traffic to take.
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...