site to site vpn through dmz

[justuniversity]

Hello

I am trying to configure site to site vpn between Cisco ASA and Cisco router 3825, I need to establish the vpn connection with an interface that has security level of 90.

I followed the procedure shown in the following link:

http://www.cisco.com/en/US/products/ps5855/products_configuration_example09186a0080a9a7a3.shtml#ND

but it doesn't work

please help

[justuniversity]

I meant by through a DMZ: DMZ interface configured on the ASA itself which is one of the VPN peers and not through the ASA outside interface which have security level of 0. (end to end connectivity between peers were verified but VPN was not working)