I am trying to set up vpn connection between a asa 5505 with software version 7.2 and an ASA 5510 with software version 8.0. I have tried several encryptions and authentications but no success. From the 5510 I have a vpn running to a zyxel and a cisco 877 router with no problems. The 5505 I have been able to connect a tunnel to another 5505 with the same version. Has anybody seen problems between 7.2 and 8.0 on ths asa's?