You can increase the connection timeout value as a workaround for this problem. Also you should change the client to allow for transparent tunneling. The error "Error with call to IpHlpApi.DLL: DeleteIpForwardEntry" is cosmetic and means that the client fail to delete the routing table based on split tunnel.
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...